Top 100 PSLE Vocabulary List resources can make space science and informational reading far easier to understand. This guide focuses on Grade 6 space vocabulary, solar system words, astronomy terms, planets, Moon phases, eclipses, stars, galaxies and space exploration. The one hundred entries are world-facing and suitable for upper-primary reading, science and composition.
Current Grade 6 space vocabulary materials commonly include orbit, rotation, revolution, gravity, Moon phases, eclipses, terrestrial planets, gas giants, asteroids and galaxies. This article expands that search language into a larger connected system that also covers observation, exploration, electromagnetic radiation and scientific evidence.
This page owns the Grade 6/PSLE space-and-astronomy search job. It complements the Science Investigation and Experiment Words list, which teaches scientific method, while this child owns the content vocabulary of space.
How to Use This Top 100 List
Alicia, Tricia and Kai Kai use this article as an active vocabulary system. For every term they study the core meaning, identify the context, compare a related term, use it in a fresh sentence, explain it aloud and retrieve it again after a delay. That sequence turns a topic list into usable Grade 6 knowledge.
Study ten words at a time, but keep bringing older terms back. Sort words by function, process, object, location or relationship. Build short cloze passages and explain why one neighbouring word is more precise than another. The aim is transfer across reading, science, composition and oral explanation.
Space Foundations
1. space
Meaning: the vast region beyond Earth’s atmosphere. Model: Space contains planets, stars, galaxies and much more. Space is not completely empty.
Context test: Cover space and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare space with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing space. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use space in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain space aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where space matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Space is not completely empty.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
2. universe
Meaning: all space, matter, energy and time considered together. Model: The universe contains billions of galaxies. The universe is larger than any one galaxy.
Context test: Cover universe and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare universe with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing universe. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use universe in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain universe aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where universe matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. The universe is larger than any one galaxy.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
3. galaxy
Meaning: a huge system of stars, gas, dust and dark matter held together by gravity. Model: The Milky Way is a galaxy. Galaxies contain many star systems.
Context test: Cover galaxy and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare galaxy with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing galaxy. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use galaxy in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain galaxy aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where galaxy matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Galaxies contain many star systems.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
4. solar system
Meaning: the Sun and all objects gravitationally bound to it. Model: Earth is part of the solar system. The solar system is one small part of the Milky Way.
Context test: Cover solar system and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare solar system with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing solar system. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use solar system in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain solar system aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where solar system matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. The solar system is one small part of the Milky Way.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
5. star
Meaning: a massive glowing ball of hot plasma producing energy through nuclear fusion. Model: The Sun is a star. Stars vary in size, temperature and age.
Context test: Cover star and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare star with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing star. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use star in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain star aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where star matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Stars vary in size, temperature and age.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
6. Sun
Meaning: the star at the centre of our solar system. Model: The Sun provides light and heat to Earth. Sun is capitalised when naming our star.
Context test: Cover Sun and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Sun with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Sun. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Sun in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Sun aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Sun matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Sun is capitalised when naming our star.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
7. planet
Meaning: a large body orbiting a star and meeting specific astronomical criteria. Model: Earth is a planet. Planets do not produce their own visible light like stars.
Context test: Cover planet and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare planet with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing planet. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use planet in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain planet aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where planet matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Planets do not produce their own visible light like stars.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
8. dwarf planet
Meaning: a rounded body orbiting the Sun that has not cleared its orbital neighbourhood. Model: Pluto is classified as a dwarf planet. Dwarf planet is a formal category.
Context test: Cover dwarf planet and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare dwarf planet with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing dwarf planet. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use dwarf planet in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain dwarf planet aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where dwarf planet matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Dwarf planet is a formal category.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
9. moon
Meaning: a natural satellite orbiting a planet or other body. Model: Earth has one large moon. Other planets can have many moons.
Context test: Cover moon and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare moon with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing moon. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use moon in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain moon aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where moon matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Other planets can have many moons.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
10. natural satellite
Meaning: a naturally occurring object that orbits a larger body. Model: The Moon is Earth’s natural satellite. Artificial satellites are human-made.
Context test: Cover natural satellite and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare natural satellite with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing natural satellite. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use natural satellite in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain natural satellite aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where natural satellite matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Artificial satellites are human-made.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Motion And Gravity
11. orbit
Meaning: the curved path of one object around another due to gravity. Model: Earth follows an orbit around the Sun. Orbit can be noun or verb.
Context test: Cover orbit and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare orbit with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing orbit. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use orbit in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain orbit aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where orbit matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Orbit can be noun or verb.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
12. rotation
Meaning: the spinning of an object around its axis. Model: Earth’s rotation causes day and night. Rotation differs from revolution.
Context test: Cover rotation and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare rotation with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing rotation. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use rotation in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain rotation aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where rotation matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Rotation differs from revolution.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
13. revolution
Meaning: one complete journey of an object around another. Model: Earth completes one revolution around the Sun each year. Revolution is orbital motion.
Context test: Cover revolution and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare revolution with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing revolution. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use revolution in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain revolution aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where revolution matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Revolution is orbital motion.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
14. axis
Meaning: an imaginary line around which an object rotates. Model: Earth rotates around its axis. Axis direction affects seasons.
Context test: Cover axis and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare axis with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing axis. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use axis in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain axis aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where axis matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Axis direction affects seasons.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
15. tilt
Meaning: the angle of an axis relative to a reference plane. Model: Earth’s axial tilt contributes to seasons. Tilt is not the same as orbit shape.
Context test: Cover tilt and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare tilt with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing tilt. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use tilt in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain tilt aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where tilt matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Tilt is not the same as orbit shape.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
16. gravity
Meaning: the attractive interaction between masses. Model: Gravity keeps planets in orbit. Gravity acts over distance.
Context test: Cover gravity and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare gravity with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing gravity. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use gravity in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain gravity aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where gravity matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Gravity acts over distance.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
17. mass
Meaning: the amount of matter in an object. Model: A planet has much more mass than a small asteroid. Mass differs from weight.
Context test: Cover mass and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare mass with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing mass. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use mass in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain mass aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where mass matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Mass differs from weight.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
18. weight
Meaning: the force on an object due to gravity. Model: An astronaut’s weight changes on the Moon. Mass stays the same while weight can change.
Context test: Cover weight and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare weight with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing weight. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use weight in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain weight aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where weight matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Mass stays the same while weight can change.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
19. trajectory
Meaning: the path followed by a moving object. Model: The probe’s trajectory carried it past Mars. Trajectories can be planned and adjusted.
Context test: Cover trajectory and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare trajectory with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing trajectory. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use trajectory in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain trajectory aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where trajectory matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Trajectories can be planned and adjusted.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
20. escape velocity
Meaning: the minimum speed needed to escape a body’s gravitational pull without further propulsion. Model: Spacecraft need very high speed to escape Earth. Escape velocity depends on mass and distance.
Context test: Cover escape velocity and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare escape velocity with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing escape velocity. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use escape velocity in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain escape velocity aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where escape velocity matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Escape velocity depends on mass and distance.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Planets
21. Mercury
Meaning: the closest planet to the Sun. Model: Mercury has a short year. Mercury is a rocky planet.
Context test: Cover Mercury and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Mercury with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Mercury. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Mercury in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Mercury aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Mercury matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Mercury is a rocky planet.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
22. Venus
Meaning: the second planet from the Sun. Model: Venus has a thick atmosphere. Venus is similar in size to Earth.
Context test: Cover Venus and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Venus with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Venus. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Venus in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Venus aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Venus matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Venus is similar in size to Earth.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
23. Earth
Meaning: the third planet from the Sun and our home world. Model: Earth has liquid surface oceans. Earth supports known life.
Context test: Cover Earth and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Earth with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Earth. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Earth in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Earth aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Earth matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Earth supports known life.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
24. Mars
Meaning: the fourth planet from the Sun. Model: Mars is often called the Red Planet. Iron minerals give Mars its reddish appearance.
Context test: Cover Mars and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Mars with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Mars. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Mars in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Mars aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Mars matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Iron minerals give Mars its reddish appearance.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
25. Jupiter
Meaning: the largest planet in the solar system. Model: Jupiter has a giant storm called the Great Red Spot. Jupiter is a gas giant.
Context test: Cover Jupiter and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Jupiter with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Jupiter. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Jupiter in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Jupiter aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Jupiter matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Jupiter is a gas giant.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
26. Saturn
Meaning: a gas giant famous for its visible ring system. Model: Saturn’s rings contain ice and rock particles. Saturn has many moons.
Context test: Cover Saturn and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Saturn with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Saturn. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Saturn in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Saturn aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Saturn matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Saturn has many moons.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
27. Uranus
Meaning: an ice giant with an extreme axial tilt. Model: Uranus rotates with its axis tilted dramatically. Uranus is farther from the Sun than Saturn.
Context test: Cover Uranus and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Uranus with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Uranus. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Uranus in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Uranus aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Uranus matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Uranus is farther from the Sun than Saturn.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
28. Neptune
Meaning: the farthest major planet from the Sun. Model: Neptune has very strong winds. Neptune is an ice giant.
Context test: Cover Neptune and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Neptune with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Neptune. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Neptune in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Neptune aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Neptune matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Neptune is an ice giant.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
29. terrestrial planet
Meaning: a rocky planet with a solid surface. Model: Earth and Mars are terrestrial planets. Mercury and Venus are also terrestrial planets.
Context test: Cover terrestrial planet and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare terrestrial planet with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing terrestrial planet. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use terrestrial planet in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain terrestrial planet aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where terrestrial planet matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Mercury and Venus are also terrestrial planets.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
30. giant planet
Meaning: a large planet composed mostly of gases or volatile materials rather than a solid rocky surface. Model: Jupiter is a giant planet. Gas giants and ice giants are both giant planets.
Context test: Cover giant planet and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare giant planet with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing giant planet. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use giant planet in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain giant planet aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where giant planet matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Gas giants and ice giants are both giant planets.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Moon And Eclipses
31. lunar phase
Meaning: the apparent shape of the illuminated part of the Moon seen from Earth. Model: The lunar phase changes through the month. Phases come from changing viewing geometry.
Context test: Cover lunar phase and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare lunar phase with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing lunar phase. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use lunar phase in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain lunar phase aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where lunar phase matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Phases come from changing viewing geometry.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
32. new moon
Meaning: the lunar phase when the Moon’s sunlit side faces mostly away from Earth. Model: A new moon is difficult to see. It marks the start of a phase cycle.
Context test: Cover new moon and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare new moon with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing new moon. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use new moon in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain new moon aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where new moon matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. It marks the start of a phase cycle.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
33. crescent
Meaning: a lunar shape where less than half the visible disk is illuminated. Model: A thin crescent appeared after sunset. Crescent can be waxing or waning.
Context test: Cover crescent and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare crescent with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing crescent. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use crescent in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain crescent aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where crescent matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Crescent can be waxing or waning.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
34. first quarter
Meaning: the phase when half of the Moon’s visible disk is illuminated during waxing. Model: The first-quarter Moon rose in the afternoon. Quarter refers to cycle position, not visible fraction.
Context test: Cover first quarter and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare first quarter with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing first quarter. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use first quarter in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain first quarter aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where first quarter matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Quarter refers to cycle position, not visible fraction.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
35. full moon
Meaning: the phase when the Moon’s Earth-facing side is fully illuminated. Model: The full moon lit the landscape. Full moons occur about once each lunar cycle.
Context test: Cover full moon and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare full moon with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing full moon. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use full moon in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain full moon aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where full moon matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Full moons occur about once each lunar cycle.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
36. gibbous
Meaning: a lunar phase where more than half but less than all of the disk is illuminated. Model: The Moon appeared gibbous. Gibbous can be waxing or waning.
Context test: Cover gibbous and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare gibbous with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing gibbous. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use gibbous in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain gibbous aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where gibbous matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Gibbous can be waxing or waning.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
37. waxing
Meaning: describing the Moon when the illuminated portion appears to increase. Model: The waxing Moon grew brighter each evening. Waxing means increasing illumination.
Context test: Cover waxing and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare waxing with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing waxing. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use waxing in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain waxing aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where waxing matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Waxing means increasing illumination.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
38. waning
Meaning: describing the Moon when the illuminated portion appears to decrease. Model: The waning Moon became a crescent. Waning means decreasing illumination.
Context test: Cover waning and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare waning with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing waning. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use waning in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain waning aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where waning matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Waning means decreasing illumination.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
39. solar eclipse
Meaning: an event where the Moon moves between Earth and the Sun and blocks some sunlight. Model: A solar eclipse was visible along a narrow path. Safe viewing methods are essential.
Context test: Cover solar eclipse and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare solar eclipse with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing solar eclipse. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use solar eclipse in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain solar eclipse aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where solar eclipse matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Safe viewing methods are essential.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
40. lunar eclipse
Meaning: an event where Earth moves between the Sun and Moon and Earth’s shadow falls on the Moon. Model: The lunar eclipse turned the Moon reddish. Lunar eclipses can be seen from the night side of Earth.
Context test: Cover lunar eclipse and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare lunar eclipse with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing lunar eclipse. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use lunar eclipse in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain lunar eclipse aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where lunar eclipse matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Lunar eclipses can be seen from the night side of Earth.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Small Bodies
41. asteroid
Meaning: a small rocky or metallic body orbiting the Sun. Model: An asteroid passed safely beyond Earth. Most known asteroids orbit between Mars and Jupiter.
Context test: Cover asteroid and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare asteroid with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing asteroid. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use asteroid in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain asteroid aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where asteroid matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Most known asteroids orbit between Mars and Jupiter.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
42. asteroid belt
Meaning: the region between Mars and Jupiter containing many asteroids. Model: Ceres lies in the asteroid belt. The belt is mostly empty space.
Context test: Cover asteroid belt and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare asteroid belt with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing asteroid belt. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use asteroid belt in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain asteroid belt aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where asteroid belt matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. The belt is mostly empty space.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
43. comet
Meaning: an icy body that can develop a glowing coma and tails near the Sun. Model: The comet brightened as it approached the Sun. Comet tails point generally away from the Sun.
Context test: Cover comet and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare comet with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing comet. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use comet in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain comet aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where comet matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Comet tails point generally away from the Sun.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
44. meteoroid
Meaning: a small rocky or metallic object travelling through space. Model: The meteoroid entered Earth’s atmosphere. Meteoroid is the space object.
Context test: Cover meteoroid and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare meteoroid with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing meteoroid. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use meteoroid in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain meteoroid aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where meteoroid matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Meteoroid is the space object.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
45. meteor
Meaning: the streak of light produced when a meteoroid burns in an atmosphere. Model: A bright meteor crossed the sky. Meteor is the visible phenomenon.
Context test: Cover meteor and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare meteor with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing meteor. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use meteor in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain meteor aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where meteor matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Meteor is the visible phenomenon.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
46. meteorite
Meaning: a piece of a meteoroid that survives passage through the atmosphere and reaches the ground. Model: Scientists studied the meteorite. Meteorite is found on the surface.
Context test: Cover meteorite and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare meteorite with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing meteorite. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use meteorite in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain meteorite aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where meteorite matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Meteorite is found on the surface.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
47. Kuiper Belt
Meaning: a region beyond Neptune containing many icy bodies. Model: Pluto is part of the Kuiper Belt region. It contains dwarf planets and smaller objects.
Context test: Cover Kuiper Belt and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Kuiper Belt with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Kuiper Belt. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Kuiper Belt in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Kuiper Belt aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Kuiper Belt matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. It contains dwarf planets and smaller objects.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
48. Oort Cloud
Meaning: a distant theoretical cloud of icy bodies surrounding the solar system. Model: Some long-period comets may come from the Oort Cloud. It is far beyond the planets.
Context test: Cover Oort Cloud and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Oort Cloud with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Oort Cloud. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Oort Cloud in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Oort Cloud aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Oort Cloud matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. It is far beyond the planets.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
49. crater
Meaning: a bowl-shaped depression made by an impact or volcanic activity. Model: The Moon has many impact craters. Craters preserve evidence of collisions.
Context test: Cover crater and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare crater with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing crater. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use crater in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain crater aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where crater matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Craters preserve evidence of collisions.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
50. impact
Meaning: a collision between astronomical objects. Model: The asteroid impact released enormous energy. Impact effects depend on size and speed.
Context test: Cover impact and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare impact with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing impact. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use impact in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain impact aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where impact matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Impact effects depend on size and speed.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Stars And Galaxies
51. constellation
Meaning: a recognised pattern or region of stars in the sky. Model: Orion is a well-known constellation. Stars in a constellation may be far apart in space.
Context test: Cover constellation and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare constellation with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing constellation. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use constellation in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain constellation aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where constellation matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Stars in a constellation may be far apart in space.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
52. nebula
Meaning: a large cloud of gas and dust in space. Model: New stars can form inside some nebulae. Nebulae have different origins.
Context test: Cover nebula and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare nebula with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing nebula. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use nebula in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain nebula aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where nebula matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Nebulae have different origins.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
53. light-year
Meaning: the distance light travels in one year. Model: Nearby stars are several light-years away. A light-year measures distance, not time.
Context test: Cover light-year and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare light-year with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing light-year. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use light-year in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain light-year aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where light-year matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. A light-year measures distance, not time.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
54. luminosity
Meaning: the total amount of energy a star emits per unit time. Model: A massive star can have high luminosity. Brightness seen from Earth also depends on distance.
Context test: Cover luminosity and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare luminosity with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing luminosity. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use luminosity in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain luminosity aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where luminosity matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Brightness seen from Earth also depends on distance.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
55. red giant
Meaning: a large cool luminous star in a late stage of stellar evolution. Model: The Sun will eventually become a red giant. Red giants have expanded outer layers.
Context test: Cover red giant and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare red giant with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing red giant. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use red giant in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain red giant aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where red giant matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Red giants have expanded outer layers.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
56. white dwarf
Meaning: a small dense stellar remnant left after some stars shed their outer layers. Model: A white dwarf can be about Earth-sized. It contains a large amount of mass.
Context test: Cover white dwarf and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare white dwarf with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing white dwarf. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use white dwarf in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain white dwarf aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where white dwarf matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. It contains a large amount of mass.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
57. supernova
Meaning: a powerful stellar explosion. Model: The supernova briefly became extremely bright. Some supernovae create heavy elements.
Context test: Cover supernova and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare supernova with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing supernova. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use supernova in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain supernova aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where supernova matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Some supernovae create heavy elements.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
58. black hole
Meaning: a region where gravity is so strong that not even light can escape from within the event horizon. Model: Astronomers detected matter around a black hole. Black holes are inferred through effects on surroundings.
Context test: Cover black hole and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare black hole with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing black hole. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use black hole in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain black hole aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where black hole matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Black holes are inferred through effects on surroundings.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
59. Milky Way
Meaning: the galaxy containing our solar system. Model: The Milky Way appears as a pale band in dark skies. Our solar system is one small part of it.
Context test: Cover Milky Way and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare Milky Way with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing Milky Way. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use Milky Way in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain Milky Way aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where Milky Way matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Our solar system is one small part of it.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
60. exoplanet
Meaning: a planet orbiting a star outside our solar system. Model: Astronomers have discovered thousands of exoplanets. Detection methods reveal planets indirectly or directly.
Context test: Cover exoplanet and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare exoplanet with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing exoplanet. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use exoplanet in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain exoplanet aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where exoplanet matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Detection methods reveal planets indirectly or directly.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Space Exploration
61. rocket
Meaning: a vehicle propelled by high-speed exhaust and used to reach high altitude or space. Model: The rocket launched the spacecraft. Rockets work by action and reaction.
Context test: Cover rocket and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare rocket with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing rocket. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use rocket in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain rocket aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where rocket matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Rockets work by action and reaction.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
62. spacecraft
Meaning: a vehicle or machine designed to travel or operate in space. Model: The spacecraft entered orbit. Spacecraft include crewed and uncrewed vehicles.
Context test: Cover spacecraft and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare spacecraft with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing spacecraft. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use spacecraft in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain spacecraft aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where spacecraft matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Spacecraft include crewed and uncrewed vehicles.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
63. space probe
Meaning: an uncrewed spacecraft sent to study space or celestial bodies. Model: The space probe transmitted images. Probes can fly by, orbit or land.
Context test: Cover space probe and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare space probe with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing space probe. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use space probe in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain space probe aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where space probe matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Probes can fly by, orbit or land.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
64. rover
Meaning: a mobile robotic vehicle that explores a surface. Model: The rover travelled across Mars. Rovers carry instruments.
Context test: Cover rover and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare rover with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing rover. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use rover in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain rover aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where rover matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Rovers carry instruments.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
65. telescope
Meaning: an instrument that gathers radiation to observe distant objects. Model: The telescope revealed faint galaxies. Telescopes can use visible light or other wavelengths.
Context test: Cover telescope and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare telescope with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing telescope. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use telescope in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain telescope aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where telescope matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Telescopes can use visible light or other wavelengths.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
66. observatory
Meaning: a facility used to observe astronomical objects. Model: The observatory is located on a high mountain. Observatories can be ground-based or in space.
Context test: Cover observatory and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare observatory with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing observatory. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use observatory in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain observatory aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where observatory matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Observatories can be ground-based or in space.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
67. astronaut
Meaning: a person trained to travel and work in space. Model: The astronaut conducted experiments in orbit. Different countries use different related titles.
Context test: Cover astronaut and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare astronaut with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing astronaut. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use astronaut in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain astronaut aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where astronaut matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Different countries use different related titles.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
68. space station
Meaning: a crewed structure designed for long-term operation in orbit. Model: The astronauts lived aboard the space station. Space stations support research.
Context test: Cover space station and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare space station with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing space station. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use space station in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain space station aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where space station matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Space stations support research.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
69. launch
Meaning: the act of sending a rocket or spacecraft into flight. Model: The launch was delayed by weather. Launch can be noun or verb.
Context test: Cover launch and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare launch with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing launch. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use launch in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain launch aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where launch matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Launch can be noun or verb.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
70. mission
Meaning: a planned operation with defined scientific or exploration goals. Model: The mission studied an asteroid. Missions can involve several spacecraft stages.
Context test: Cover mission and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare mission with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing mission. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use mission in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain mission aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where mission matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Missions can involve several spacecraft stages.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Astronomical Observation
71. radio telescope
Meaning: an instrument that detects radio waves from space. Model: The radio telescope observed a distant galaxy. It does not collect visible light.
Context test: Cover radio telescope and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare radio telescope with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing radio telescope. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use radio telescope in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain radio telescope aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where radio telescope matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. It does not collect visible light.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
72. spectroscope
Meaning: an instrument that separates light into a spectrum for analysis. Model: The spectroscope revealed chemical signatures. Spectra reveal composition and motion.
Context test: Cover spectroscope and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare spectroscope with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing spectroscope. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use spectroscope in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain spectroscope aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where spectroscope matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Spectra reveal composition and motion.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
73. detector
Meaning: a device that senses radiation or particles. Model: The detector recorded faint infrared signals. Different detectors respond to different wavelengths.
Context test: Cover detector and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare detector with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing detector. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use detector in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain detector aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where detector matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Different detectors respond to different wavelengths.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
74. image
Meaning: a visual or data-based representation of an observed object. Model: The telescope image showed a nebula. Astronomical images may use false colour.
Context test: Cover image and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare image with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing image. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use image in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain image aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where image matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Astronomical images may use false colour.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
75. signal
Meaning: measurable information carried by radiation or particles. Model: Scientists separated the signal from noise. Weak signals require careful analysis.
Context test: Cover signal and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare signal with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing signal. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use signal in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain signal aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where signal matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Weak signals require careful analysis.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
76. wavelength
Meaning: the distance between repeating points of a wave. Model: Different wavelengths reveal different features. Wavelength relates to frequency and energy.
Context test: Cover wavelength and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare wavelength with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing wavelength. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use wavelength in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain wavelength aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where wavelength matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Wavelength relates to frequency and energy.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
77. spectrum
Meaning: a range of wavelengths or frequencies. Model: The star’s spectrum contained dark lines. Spectra reveal physical properties.
Context test: Cover spectrum and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare spectrum with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing spectrum. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use spectrum in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain spectrum aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where spectrum matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Spectra reveal physical properties.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
78. radio wave
Meaning: low-frequency electromagnetic radiation used in astronomy and communication. Model: Radio waves can travel through interstellar space. They are part of the electromagnetic spectrum.
Context test: Cover radio wave and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare radio wave with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing radio wave. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use radio wave in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain radio wave aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where radio wave matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. They are part of the electromagnetic spectrum.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
79. infrared
Meaning: electromagnetic radiation with wavelengths longer than visible red light. Model: Infrared observations can reveal cool dust. Human eyes cannot see infrared directly.
Context test: Cover infrared and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare infrared with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing infrared. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use infrared in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain infrared aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where infrared matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Human eyes cannot see infrared directly.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
80. ultraviolet
Meaning: electromagnetic radiation with wavelengths shorter than visible violet light. Model: Ultraviolet telescopes study hot energetic objects. Earth’s atmosphere blocks much ultraviolet.
Context test: Cover ultraviolet and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare ultraviolet with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing ultraviolet. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use ultraviolet in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain ultraviolet aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where ultraviolet matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Earth’s atmosphere blocks much ultraviolet.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Earth And Sky
81. atmosphere
Meaning: a layer of gases surrounding a planet or moon. Model: Earth’s atmosphere protects life and affects observations. Atmospheres vary across planets.
Context test: Cover atmosphere and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare atmosphere with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing atmosphere. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use atmosphere in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain atmosphere aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where atmosphere matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Atmospheres vary across planets.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
82. aurora
Meaning: a natural light display caused by charged particles interacting with an atmosphere and magnetic field. Model: The aurora glowed near the polar sky. Auroras occur on several planets.
Context test: Cover aurora and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare aurora with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing aurora. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use aurora in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain aurora aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where aurora matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Auroras occur on several planets.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
83. magnetic field
Meaning: a region where magnetic forces act. Model: Earth’s magnetic field interacts with the solar wind. Magnetic fields can guide charged particles.
Context test: Cover magnetic field and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare magnetic field with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing magnetic field. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use magnetic field in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain magnetic field aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where magnetic field matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Magnetic fields can guide charged particles.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
84. day
Meaning: the time taken for a planet to rotate once, or a period of light and darkness in everyday use. Model: One Earth day is about twenty-four hours. Planetary days vary.
Context test: Cover day and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare day with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing day. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use day in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain day aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where day matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Planetary days vary.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
85. year
Meaning: the time taken for a planet to complete one orbit around its star. Model: One Earth year is about 365 days. Years differ by planet.
Context test: Cover year and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare year with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing year. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use year in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain year aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where year matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Years differ by planet.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
86. season
Meaning: a recurring part of the year with characteristic conditions. Model: Earth’s tilt causes seasonal changes. Seasons are not caused by changing Earth-Sun distance.
Context test: Cover season and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare season with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing season. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use season in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain season aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where season matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Seasons are not caused by changing Earth-Sun distance.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
87. tide
Meaning: the regular rise and fall of sea level mainly caused by gravity from the Moon and Sun. Model: The Moon strongly influences tides. Local coast shape also affects tides.
Context test: Cover tide and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare tide with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing tide. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use tide in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain tide aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where tide matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Local coast shape also affects tides.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
88. equinox
Meaning: one of two times each year when day and night are approximately equal in length. Model: The March equinox marks a seasonal transition. Equinox relates to Earth’s tilt and orbit.
Context test: Cover equinox and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare equinox with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing equinox. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use equinox in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain equinox aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where equinox matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Equinox relates to Earth’s tilt and orbit.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
89. solstice
Meaning: one of two times each year when the Sun reaches its greatest north or south position in the sky. Model: The June solstice brings the longest day to the Northern Hemisphere. Solstice effects reverse between hemispheres.
Context test: Cover solstice and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare solstice with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing solstice. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use solstice in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain solstice aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where solstice matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Solstice effects reverse between hemispheres.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
90. horizon
Meaning: the apparent line where Earth and sky seem to meet. Model: The Sun disappeared below the horizon. The horizon depends on observer position.
Context test: Cover horizon and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare horizon with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing horizon. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use horizon in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain horizon aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where horizon matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. The horizon depends on observer position.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Space Science Concepts
91. vacuum
Meaning: a region with extremely little matter. Model: Most of space is close to a vacuum. Space is not perfectly empty.
Context test: Cover vacuum and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare vacuum with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing vacuum. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use vacuum in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain vacuum aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where vacuum matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Space is not perfectly empty.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
92. microgravity
Meaning: a condition where objects experience very small apparent weight because they are in free fall. Model: Astronauts experience microgravity in orbit. Gravity is still present in orbit.
Context test: Cover microgravity and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare microgravity with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing microgravity. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use microgravity in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain microgravity aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where microgravity matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Gravity is still present in orbit.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
93. radiation
Meaning: energy travelling as waves or particles. Model: Spacecraft must account for radiation exposure. Radiation includes many types.
Context test: Cover radiation and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare radiation with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing radiation. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use radiation in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain radiation aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where radiation matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Radiation includes many types.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
94. distance
Meaning: the amount of space between objects. Model: Astronomical distances can be enormous. Different units suit different scales.
Context test: Cover distance and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare distance with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing distance. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use distance in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain distance aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where distance matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Different units suit different scales.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
95. scale
Meaning: the relative size or distance used to represent something. Model: A model solar system needs a carefully chosen scale. Space scales are difficult to show accurately.
Context test: Cover scale and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare scale with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing scale. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use scale in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain scale aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where scale matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Space scales are difficult to show accurately.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
96. model
Meaning: a simplified representation used to explain or predict a system. Model: Students built a model of planetary orbits. Models always have limitations.
Context test: Cover model and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare model with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing model. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use model in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain model aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where model matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Models always have limitations.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
97. observation
Meaning: information collected by watching or measuring. Model: The observation showed a change in brightness. Observations are evidence, not explanations by themselves.
Context test: Cover observation and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare observation with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing observation. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use observation in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain observation aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where observation matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Observations are evidence, not explanations by themselves.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
98. evidence
Meaning: information used to support or challenge a scientific idea. Model: Astronomers combined several kinds of evidence. Evidence quality matters.
Context test: Cover evidence and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare evidence with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing evidence. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use evidence in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain evidence aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where evidence matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Evidence quality matters.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
99. hypothesis
Meaning: a testable proposed explanation. Model: The team formed a hypothesis about the signal. Hypotheses need evidence.
Context test: Cover hypothesis and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare hypothesis with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing hypothesis. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use hypothesis in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain hypothesis aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where hypothesis matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Hypotheses need evidence.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
100. data
Meaning: recorded measurements or observations. Model: The satellite transmitted data to Earth. Data require interpretation.
Context test: Cover data and read the model as a cloze item. Identify at least two clues that reveal whether the missing idea is an object, process, structure, measurement, movement, tool, condition or relationship. Predict the category before revealing the answer.
Precision test: Compare data with a nearby term from this section. State one overlap and one boundary. Then write a sentence in which the neighbouring word would be inaccurate. Precision matters more than memorising a longer definition.
Reading transfer: Alicia writes a four-sentence Grade 6 passage containing data. Tricia underlines the clues that make the meaning recoverable. Kai Kai proposes a plausible distractor and explains exactly which clue eliminates it. Rotate the roles.
Writing transfer: Use data in a fresh explanatory paragraph. Add one natural collocation, cause, effect, comparison or measurement. The term should help the reader understand the topic rather than simply make the sentence sound technical.
Oral transfer: Explain data aloud in twenty seconds without reading the definition. Then answer one follow-up beginning with how, why, where, what happens next or what is the difference. If the explanation becomes circular, return to a concrete example.
Scenario test: Invent a realistic or scientific situation where data matters. Change one condition so a related term becomes more accurate. Explain the switch and identify the clue that caused it. Data require interpretation.
Delayed retrieval: Two days later, retrieve the term from the definition, the definition from the term and a new example from memory. Mix it with older terms so page order cannot provide the answer.
Cumulative Practice
Mix at least twenty terms from different sections in each later review. Sort them, complete cloze items, explain contrasts and write one paragraph using five words naturally. Return to the Vocabulary Learning Hub for the wider vocabulary architecture.