Primary 3 MOE/SEAB Science Examinations | Question Words: Name, Describe, Compare, Explain and Predict

What do name, identify, state, describe, compare, explain, predict, classify and infer mean in Primary 3 Science questions? The quickest answer is that each word tells the child what kind of response is needed. A pupil who knows that a grasshopper has a nymph may still lose school-assessment marks by writing only one animal’s life cycle when asked to compare two. This guide teaches ten useful question-word families with 40 original P3 Science exercises, model answers, typical wrong moves and fresh examples to check understanding.

Singapore’s MOE Primary Science syllabus emphasises scientific knowledge, practices and communication, including clear written, visual and tabular explanations. But there is no national SEAB Primary 3 Science examination; P3 assessments are school-based, and teachers decide their own item wording and mark allocations. These command-word explanations are practical study guidance, not an official nationwide marking formula or guarantee about what appears in a 2027 school paper. The MOE syllabus glossary provides the underlying science-process definitions.

Name / identify / state: supply the precise fact or selected item asked for.
Describe: report what the picture, result or process shows.
Compare: mention both things along the same characteristic.
Explain: link an observation to the relevant scientific idea.
Predict / infer: distinguish a future expectation from a conclusion based on recorded evidence.
Classify / evaluate / suggest: use a meaningful rule, assess a claim or propose a practical action.
Practise: 40 independent prompts, worked model responses and a one-week routine.
Stay within P3: living things, material properties, plant and animal cycles, and magnets.

Why Question Words Matter More Than Memorising Longer Answers

Consider three requests about a magnet: ‘Name the interaction’, ‘Describe what happened’ and ‘Explain why it happened’. With two North poles facing, the name is repulsion; a description is that the magnets moved apart; an explanation uses the rule that like magnetic poles repel. The content is related, but the required response is not identical. A child who writes a beautiful paragraph about where magnets are used may fail to address the actual question.

The MOE science-process glossary uses verbs such as identify, describe, compare, classify, infer, predict and evaluate as ways of working with scientific information. Schools can phrase questions differently, and scientific marks are ultimately awarded against the particular school’s expected response. Teach the child to read the full sentence rather than relying only on a verb. For example, ‘state one difference’ calls for a comparison even though ‘state’ appears in the wording.

The Quick Command-Word Reference

Instruction	What the pupil should provide	Short example
Name / identify	The specific requested word, item, stage or group	A mushroom is a fungus
State	A concise fact or requested result	Like poles repel
Describe	Relevant observed feature or sequence	The strip bent without breaking
Compare	Same feature discussed for both items	Butterfly has a pupa; grasshopper does not
Explain	Evidence plus the science that makes it meaningful	The cover is suitable because it did not absorb water
Predict	Expected outcome based on a known pattern	North–South poles are expected to attract
Classify	Place items by a relevant shared rule	Bird in birds; frog in amphibians
Infer	Supported interpretation of given observations	The seed developed into a young plant
Suggest	Plausible practical action	Keep water amounts equal in a fair absorption test
Evaluate	Judge whether a claim or method is supported	One floating block cannot prove all wood floats

Forty Original Question-Word Exercises

1. Name: What Does It Ask?

Supply the precise term asked for, without a long unrelated explanation. A question asking for one name may need one word or short phrase.

Try each numbered question without looking at the answer. If a diagram or table is described, draw a quick version on paper and point to the decisive information before writing. The answer should be short enough to remain relevant, but complete enough to meet the instruction.

Name practice 1: A photograph identifies a mushroom. Name its broad living group.

Model response: Fungi.

Why this fits the command: The species label supports its classification. A long explanation about growing in soil would not replace the required group name. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil writes ‘non-flowering plant’ because no flower appears. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Name the broad group of yeast. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Name practice 2: A teacher shows a butterfly cycle: egg → caterpillar → [blank] → adult. Name the missing stage.

Model response: Pupa.

Why this fits the command: The caterpillar is the butterfly’s larva; the pupa lies between the larva and the adult. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child writes ‘nymph’, copying a grasshopper cycle. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Name the missing stage between larva and adult beetle. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Name practice 3: A student sees a strip bend repeatedly without breaking. Name the material property.

Model response: Flexibility.

Why this fits the command: The described test concerns bending. Strength under a heavy load is a separate material property. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student writes ‘softness’ without addressing the ability to bend. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Name the property relevant to a carrying handle that must not break under a load. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Name practice 4: Two bar magnets are shown with North facing North. Name the interaction.

Model response: Repulsion.

Why this fits the command: Like poles repel, so the named interaction is the pushing-apart effect. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child answers ‘magnetism’ without identifying attraction versus repulsion. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Name the interaction when South faces North. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

2. Identify: What Does It Ask?

Select the relevant object, group or piece of evidence. MOE’s glossary uses identify for selecting and/or naming; the answer should match the material provided.

Identify practice 1: From a labelled set of frog, bird and butterfly pictures, identify the amphibian.

Model response: The frog.

Why this fits the command: Frog belongs to amphibians, while bird and butterfly represent different broad animal groups. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child selects the fish-like-looking butterfly larva or the bird near water. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Identify an insect from the same set. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Identify practice 2: From results A: water absorbed, B: not absorbed, C: water absorbed, identify the sample showing waterproofness.

Model response: Sample B.

Why this fits the command: The relevant observation is non-absorption of water. This is what the P3 waterproof definition uses. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil chooses C because it is last in the table. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Identify two samples that absorbed water. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Identify practice 3: A mosquito cycle has egg, larva, pupa, adult. Identify the stage before the adult.

Model response: Pupa.

Why this fits the command: The arrow into the adult stage comes from the pupa in this life-cycle sequence. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child reads backwards from egg and chooses larva. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Identify the stage following the mosquito egg. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Identify practice 4: A known magnet attracts an iron clip but not a plastic cap. Identify the tested item that is magnetic material.

Model response: The iron clip.

Why this fits the command: Iron is a familiar magnetic material. Attraction alone does not prove the clip is itself a permanent magnet. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student labels the plastic cap magnetic because it is lightweight. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Identify the item that was not attracted in this test. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

3. State: What Does It Ask?

Give a clear science fact requested, usually briefly. Do not substitute an unrelated fact from the same chapter.

State practice 1: State what happens when the like poles of two magnets face each other.

Model response: They repel one another.

Why this fits the command: This is a basic pole rule. It applies to North–North and South–South pairs. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child says like poles attract because magnets attract paper clips. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: State the rule for unlike poles. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

State practice 2: State the broad P3 stages of a flowering plant grown from seed.

Model response: Seed → young plant → adult plant.

Why this fits the command: The P3 observation sequence concerns development of the plant through these broad stages. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student lists detailed later-level fertilisation stages instead. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: State which stage comes immediately after the seed. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

State practice 3: State one characteristic that distinguishes living organisms from a motorised toy.

Model response: Living organisms grow and carry out biological life processes, unlike a motorised toy.

Why this fits the command: A relevant characteristic is better than saying ‘the toy looks different’. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child says ‘it moves’ when both examples may move. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: State one other life characteristic of plants or animals. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

State practice 4: State what a freely suspended bar magnet tends to do once it settles.

Model response: It comes to rest roughly along the North–South direction.

Why this fits the command: The syllabus describes the resting orientation, not a temporary angle while the magnet swings. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil records its first sideways motion as the final direction. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: State why a nearby magnet may make this classroom observation less reliable. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

4. Describe: What Does It Ask?

Report the relevant features, sequence or observation in words. Describe should not quietly turn untested assumptions into facts.

Describe practice 1: A bean seed is shown on Day 1 and a young plant with leaves on Day 8. Describe what changed.

Model response: By Day 8, a young plant with leaves had developed from the seed.

Why this fits the command: The dated images show a change over time. They do not alone identify the environmental cause. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student asserts a particular amount of sunlight caused the growth. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Describe another observable change a dated plant journal could record. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Describe practice 2: Two labelled strips are gently bent. A curves without breaking; B snaps. Describe the different results.

Model response: Strip A bent without breaking; strip B broke when bent in the stated test.

Why this fits the command: The question asks for observed differences, not an unsupported lifetime prediction. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil says A is always better for every purpose. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Describe one result that would instead test load-bearing strength. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Describe practice 3: A photograph shows a tadpole and an adult frog. Describe one visible difference.

Model response: The tadpole has a prominent tail, while the adult frog has developed legs and generally no tail.

Why this fits the command: A visible comparison uses the same feature across the two stages. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child replies only ‘the frog is bigger’. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Describe another feature that may change as a tadpole develops. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Describe practice 4: In a test, a known magnet pulls an iron paper clip towards it. Describe what was observed.

Model response: The paper clip moved towards the magnet.

Why this fits the command: That is a direct observation. The conclusion ‘clip is a permanent magnet’ would go beyond the result. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child writes a speculative claim about the clip’s magnetic poles. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Describe what you would see if two labelled like poles pushed apart. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

5. Compare: What Does It Ask?

Relate the same characteristic in both cases. A one-sided answer such as ‘a butterfly has a pupa’ is incomplete when the question asks how two animals differ.

Compare practice 1: Compare the grasshopper and butterfly life cycles regarding a pupa stage.

Model response: A butterfly has a pupa stage, whereas a grasshopper does not; the grasshopper has a nymph.

Why this fits the command: The sentence explicitly references both animals and the same feature, which creates a real comparison. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil lists only butterfly stages without mentioning grasshopper. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Compare mosquito and cockroach life cycles using the same feature. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Compare practice 2: Compare material P, which absorbs water, with Q, which does not.

Model response: P absorbed water in the test, whereas Q did not; Q showed waterproofness under the stated test.

Why this fits the command: The comparison uses water absorption for both samples rather than swapping to an unrelated property. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil says ‘Q is good’ without identifying how. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Compare two strips when one bends without breaking and the other breaks. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Compare practice 3: Compare a rooted living tree with a moving robotic toy as evidence of life.

Model response: The tree grows and has biological life processes although rooted; the robot moves mechanically but does not grow and reproduce as an organism.

Why this fits the command: The relevant difference is biological function versus simulated action, not merely which moves. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child writes only that both exist outdoors. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Compare a real resting cat with a battery-powered toy cat. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Compare practice 4: Compare two magnets when North faces North versus North faces South.

Model response: North–North repels, whereas North–South attracts.

Why this fits the command: The comparison changes the relationship between facing magnetic poles while describing the interaction consistently. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student describes a paper clip instead of comparing magnet poles. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Compare South–South and South–North interactions. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

6. Explain: What Does It Ask?

Link the relevant evidence to the scientific concept and then to the conclusion. A keyword alone often fails to answer why something happens.

Explain practice 1: Explain why a non-absorbing flexible sheet suits a raincoat cover better than an absorbent stiff one.

Model response: It does not absorb water, which supports waterproofness, and it can bend without breaking, so the tested properties match the cover’s needs.

Why this fits the command: Two requirements need two relevant pieces of evidence. This is more precise than saying the sheet is ‘better’. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child quotes the product’s colour, which was not tested. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Explain which property would matter for a bag handle carrying books. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Explain practice 2: Explain why a butterfly and grasshopper should not be given identical life-cycle stages.

Model response: A butterfly has a larva and pupa, whereas a grasshopper develops through a nymph stage without a pupa.

Why this fits the command: Different insect groups can have different development patterns; the diagram and species name matter. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil claims all insects have exactly four stages. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Explain why a mosquito is more like a butterfly than a cockroach in the pupa comparison. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Explain practice 3: Explain why an iron clip attracted by a magnet is not proven to be another magnet.

Model response: Iron is a magnetic material and may be attracted without being a permanent magnet; attraction alone does not identify a second magnet.

Why this fits the command: The observation can have more than one explanation, so it cannot establish the stronger claim. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student draws N/S labels on the clip without evidence. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Explain why repulsion with a known magnet gives more distinctive evidence. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Explain practice 4: Explain why a mushroom is not grouped with ferns solely because both grow in soil.

Model response: The mushroom belongs to fungi and the fern to plants; location alone is not the biological characteristic used to distinguish the groups.

Why this fits the command: A scientifically relevant classification uses group characteristics, not a shared setting. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child assumes all stationary organisms are plants. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Explain why a bat is not classified as a bird merely because it flies. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

7. Predict: What Does It Ask?

State what is expected from the supplied pattern or known rule, before an observation. Prediction should not be presented as a result that was already measured.

Predict practice 1: A known bar magnet’s South pole faces another South pole. Predict the interaction.

Model response: The two South poles will repel.

Why this fits the command: The outcome follows the like-pole rule. It is a prediction if the magnets have not yet been brought together. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil records it as an observed result without a test. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Predict what happens if the second magnet is turned so its North pole faces South. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Predict practice 2: A safely tested material is shown to absorb water. Predict what may happen if another equal drop is placed on the same dry type of sample under comparable conditions.

Model response: The material is expected to absorb the drop, although the actual result must still be observed.

Why this fits the command: A prediction draws on an earlier pattern; it should be qualified when conditions can differ. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child says the new result has already happened. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: What should be recorded if the sample surprisingly does not absorb the new drop? Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Predict practice 3: A butterfly caterpillar is shown just before the stage between larva and adult. Predict the next named stage.

Model response: Pupa.

Why this fits the command: The taught butterfly sequence provides the expected developmental stage. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student says ‘nymph’ from a grasshopper sequence. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Predict which broad stage follows the pupa. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Predict practice 4: A light-transmission test says sample R allows no light through. Predict how it will serve as a see-through window.

Model response: It is unlikely to serve that purpose because no light passed through in the stated test.

Why this fits the command: The prediction connects the given observed property to a new intended use. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The learner invents a claim about its strength or magnetic behaviour. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Predict which type of light result would better suit a see-through window. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

8. Classify: What Does It Ask?

Group by a stated relevant similarity or difference and apply that rule consistently. Name the rule when the question asks for it.

Classify practice 1: Classify a labelled fern, sparrow, mushroom and bacterium into four broad living groups.

Model response: Fern: plants; sparrow: animals; mushroom: fungi; bacterium: bacteria.

Why this fits the command: The identified organisms supply enough information for the broad groups. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student puts mushroom with fern because both can grow near soil. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Classify labelled hibiscus, frog, yeast and bacteria. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Classify practice 2: Classify butterfly, frog, sparrow and cat into their P3 animal groups.

Model response: Butterfly: insect; frog: amphibian; sparrow: bird; cat: mammal.

Why this fits the command: The P3 syllabus uses broad animal groups including these categories. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The learner sorts based on whether animals fly or live near water. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Add a lizard and a fish, giving their broad groups. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Classify practice 3: Classify common iron clip, wooden ruler and ordinary plastic cap by an ordinary classroom magnet test.

Model response: The iron clip contains magnetic material; the wooden ruler and plastic cap are non-magnetic samples in the described test.

Why this fits the command: The grouping rule is whether the test item is attracted by the same magnet. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student says all metals and all heavy objects are magnetic. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Where would ordinary aluminium foil belong in such a test? Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Classify practice 4: Classify sample A, which bends without breaking, and B, which breaks, based on observed flexibility.

Model response: A showed flexibility in the test; B did not.

Why this fits the command: The grouping is based on one stated property and a comparable test. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student assigns strength labels without a load test. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: What further test would classify the strips by load-bearing strength? Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

9. Infer: What Does It Ask?

Draw a reasonable conclusion from given observations or data. A good inference stays within the evidence; a missing measurement should not be imagined.

Infer practice 1: A photograph shows a viable bean seed on Day 1 and a shoot on Day 7. What can be inferred?

Model response: The seed developed into a young plant during the interval.

Why this fits the command: The two dated observations support developmental change but not a specific causal factor unless it was investigated. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil asserts extra fertiliser caused it without a test. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: What could you infer if two photographs showed no visible change? Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Infer practice 2: A known magnet repels one end of an unknown magnet when North is presented. Infer the unknown facing pole.

Model response: North.

Why this fits the command: Like poles repel, so the unknown end behaves as North in this simple known-magnet test. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child chooses South because the two poles were both mentioned elsewhere. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: What if the unknown end attracted the North pole of the other confirmed magnet? Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Infer practice 3: A table records material P bends and does not absorb water. No strength data are recorded. Infer whether it suits a flexible rain cover and what remains unknown.

Model response: It matches the tested flexibility and waterproofness requirements; its strength under load remains unknown.

Why this fits the command: The conclusion has two supported properties and one explicit limitation. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The student assumes a third property because the first two tests passed. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Which extra measurement would address load-bearing strength? Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Infer practice 4: A class tested one wooden block and saw it float. Can the class infer that every wooden object always floats?

Model response: No. The result supports only the tested block’s floating behaviour under those conditions.

Why this fits the command: One sample does not justify a universal statement about all shapes and designs. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil treats ‘all’ as stronger scientific writing. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: What additional objects or test conditions would be relevant before making a broader claim? Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

10. Suggest / Evaluate: What Does It Ask?

Suggest a reasonable action or evaluate whether a claim follows from evidence. The quality of a suggestion depends on whether it solves the stated problem safely.

Suggest / Evaluate practice 1: Suggest a safer way to study the mosquito life cycle without raising live mosquitoes at home.

Model response: Use teacher-provided photographs, labelled diagrams or trusted classroom videos.

Why this fits the command: The learning target is the egg, larva, pupa and adult sequence, not producing a breeding site. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil proposes an uncovered water container. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Evaluate why the diagram alternative still teaches the stage sequence. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Suggest / Evaluate practice 2: Evaluate this fair-test plan: fabric A receives six drops and fabric B receives one drop, then they are compared for absorption.

Model response: The comparison is weak because the water amounts differ; use comparable samples and equal water quantities.

Why this fits the command: To compare the effect of material on water absorption, relevant conditions need to be held similar. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The child sees that A looks wetter and declares it more absorbent. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Suggest two other conditions, such as sample size and observation time, to keep comparable. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Suggest / Evaluate practice 3: Suggest a suitable material property for a cupboard door seal that should not absorb water.

Model response: Waterproofness, meaning the material does not absorb water under the relevant test.

Why this fits the command: The question asks for the property needed for the stated use, not an exact brand or material formula. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil suggests magnetic poles even though the test is about water absorption. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Suggest another everyday object that benefits from the same property. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Suggest / Evaluate practice 4: Evaluate a student’s claim: ‘If an object is attracted by a bar magnet, it is certainly a permanent magnet.’

Model response: The claim is unsupported; magnetic materials such as iron can be attracted without being permanent magnets.

Why this fits the command: Attraction is not a unique test for a second magnet, whereas controlled repulsion with a known pole is more informative. Notice how the wording meets the specific demand, rather than adding an unrelated paragraph from the chapter. If a school question requires a reason, point to the particular observation or concept that establishes it.

Typical mistake: The pupil mistakes a correct observation for proof of an additional identity. Instead of merely rewriting the answer, have the child identify what they originally overlooked and whether a different question word would require a different response.

Fresh check: Suggest the next classroom observation that could help assess the unknown object. Ask for a new, independent answer after a short delay. A correct response with an accurate reason shows that the pupil can transfer the skill to a changed question, not just recall a memorised line.

Three Mini-Clinics: Turning a Weak Answer into a Strong One

Clinic 1: A correct keyword, but the command asks for explanation

Question: ‘Explain why a raincoat material should not absorb water.’ Weak response: ‘Waterproof.’ Better: ‘A material that does not absorb water is waterproof in the stated test, making it suitable for a raincoat’s rain-protection purpose.’ The revision keeps the scientific keyword, adds the observed property and links it to the use. It does not need a discussion of fabric manufacturing or a technical definition beyond P3.

Clinic 2: A true statement, but the command asks for comparison

Question: ‘Compare the life cycles of butterfly and grasshopper regarding pupae.’ Weak response: ‘Butterflies have pupae.’ Better: ‘A butterfly has a pupa stage, whereas a grasshopper has a nymph stage and no pupa.’ The improved sentence mentions both cases using the same feature. A comparison is not made by writing everything known about one side.

Clinic 3: An observed result, but the conclusion goes beyond the test

Question: ‘Infer what one iron paper clip being attracted to a magnet shows.’ Weak response: ‘All metals are magnetic and the clip is a magnet.’ Better: ‘The tested clip contains a magnetic material attracted by the bar magnet; this result does not establish that every metal is attracted or that the clip is a permanent magnet.’ The pupil learns to limit conclusions to evidence.

Seven Days to Learn the Command Words

Day 1: name, identify and state. Use eight fast factual questions and check whether each answer addresses the named item.
Day 2: describe. Work on dated plant drawings, material-test results and magnet observations without inventing causes.
Day 3: compare. Use butterfly versus grasshopper and flexible versus inflexible sample pairs.
Day 4: explain. Write a reason for a rain-cover choice and for like-pole repulsion.
Day 5: predict and infer. Separate what might happen from what was already recorded.
Day 6: classify, suggest and evaluate. Apply a meaningful rule and decide whether a test was fair.
Day 7: mix ten unfamiliar questions. Circle the exact command and explain why the response length varies.

Frequently Asked Questions

Is there an official SEAB P3 Science command-word marking scheme?

No. P3 Science is school-assessed, not a nationwide SEAB examination. The MOE syllabus provides scientific knowledge and practice guidance, while schools mark their tasks.

What is the difference between describe and explain?

Describe gives relevant observed features or an event; explain gives a scientific reason linking observations to concepts.

What does compare mean?

Discuss the same characteristic for both items, stating a meaningful similarity or difference.

Does ‘name’ need a full sentence?

Not necessarily. A precise term may be sufficient when the question only asks for a name; follow any extra school instructions.

What if the command word is not one of these ten?

Read the whole sentence and the information provided. Ask what the task needs: a fact, observation, relationship, reason, prediction or judgement.

Can an answer be scientifically correct but still lose marks?

Yes, if it omits a required comparison, does not answer the demand, or lacks a necessary explanation or evidence.

What is the fastest way to correct misunderstanding?

Have the child identify the command, point to supporting evidence and answer a different but related question independently.

Do these exercises predict 2027 school examination questions?

No. They are original practice examples that build transferable response skills within the P3 syllabus.

Official Source and More eduKate Primary 3 Science

Updated 12 November 2026. Original questions and teaching explanations; no claim of official P3 Science examination papers, future question predictions or verified Google keyword-volume rankings. Check your child’s current school assessment notice for actual requirements.

More Primary 3 Science Exam Resources

Continue with a complementary guide if you need support reading question words, recording practical observations, interpreting data or planning school-based assessment. These are independent P3 Science resources aligned to MOE content, not national SEAB P3 papers.