Series route: This guide belongs to the complete PSLE Learner’s Guide volume directory. The original PSLE Learning Guide supplies the wider English, Mathematics and Science route, while PSLE Science provide verified subject-specific continuation.
Find your route through this guide
This volume solves one precise learner problem: the learner assumes paper, plastic, glass or water must block magnetic force completely, or concludes that a barrier becomes magnetic merely because attraction is observed through it. The aim is not to memorise a slogan. It is to understand the mechanism well enough to recognise the idea when the wording, numbers, diagram or context changes. A Primary 6 learner should be able to explain the decision, perform it under time pressure, and detect a tempting answer that only looks familiar.
- Understand the mechanism before memorising a form.
- Study the worked examples and compare near-misses.
- Repair common misconceptions with targeted tests.
- Complete graded independent practice before reading the answers.
- Use delayed transfer and examination control to make the skill durable.
- Use the parent and tutor notes only after the learner has attempted the work.
The problem beneath the mistake
Place a paper clip under a sheet of paper and move a magnet above it. The clip can follow even though the magnet does not touch it.
The paper is not carrying the clip like a hidden string. Magnetic interaction acts across the separation and through the non-magnetic sheet.
Non-magnetic does not mean “blocks magnetism.” It means the material is not strongly attracted or behaving as the target magnetic material in the test.
Paper, many plastics, glass and water can allow an observable magnetic effect through them when the magnet and object are close enough.
The effect usually weakens as separation increases. Adding more sheets increases distance as well as barrier amount, so conclusions must name both.
A weak result through a thick board does not prove the material shields magnetic force. The magnet may simply be too far from the object.
Iron and steel objects are commonly attracted in classroom tests, but not every metal is strongly magnetic. Aluminium and copper provide useful counterexamples.
A barrier may change friction or movement. A paper clip under rough card may not slide even when a magnetic pull exists, so movement is not the only possible evidence.
Water can sit between a magnet and an object without automatically stopping the interaction. The container wall and distance also belong to the setup.
The magnet, barrier and object must be distinguished. Observing attraction through plastic does not make the plastic a magnet or prove it is attracted.
Strong magnets can pinch fingers, damage devices or be dangerous if swallowed. Classroom work needs suitable magnets, supervision and separation from electronics.
The reliable routine is identify magnet and test object, classify the barrier, measure total separation, keep geometry and friction controlled, observe attraction or motion, and state only what the evidence supports.
Core decision: Magnetic force can act across a gap and through many non-magnetic materials. The observed effect depends strongly on distance, magnet strength, object properties and barrier thickness; the barrier does not need to become a magnet.
A useful rule has three parts: a trigger, an operation and a check. The trigger tells you when the rule applies. The operation tells you what to do. The check tells you whether the result still matches the meaning of the question. Learners who remember only the operation often apply it in the wrong place; learners who remember only an example often freeze when the surface details change.
Mechanism: why the rule works
1. Identify the actors
The magnet and magnetic object perform different roles from the barrier.
Diagnostic question: Which item produces the magnetic field and which responds? Reliable response: Label all three parts.
2. Classify the barrier
A material can be non-magnetic without being a shield.
Diagnostic question: Is it attracted by the magnet in a separate test? Reliable response: Do not equate non-magnetic with blocking.
3. Track separation
Force effect generally falls as distance increases.
Diagnostic question: What is the total gap including the barrier? Reliable response: Measure or standardise thickness.
4. Control friction
Movement requires magnetic pull to overcome resistance.
Diagnostic question: Can the object slide or pivot freely? Reliable response: Use a low-friction, matched surface.
5. Compare one variable
Thickness and material should not change together.
Diagnostic question: What single factor is being tested? Reliable response: Keep magnet, object, orientation and start position fixed.
6. Limit the conclusion
No movement can have several causes.
Diagnostic question: Was the magnet too weak, gap too large or friction too high? Reliable response: Avoid claiming complete blocking without stronger evidence.
Worked examples: make the decision visible
Do not race through these examples. Before reading each explanation, name the evidence that matters and the information that does not. Then compare the correct route with the tempting route. That comparison is where the transferable learning sits.
Worked example 1: Paper sheet
Task. A magnet moves a paper clip through one sheet of paper.
Reasoning. Paper is non-magnetic and thin; the separation remains small. The controlling idea is the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. Magnetic force acts through the sheet.
Independent check. The paper need not become magnetic. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 2: More sheets
Task. The same setup uses ten sheets and movement is weaker.
Reasoning. Added sheets increase separation and possibly friction. The controlling idea is the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. The effect may be harder to observe.
Independent check. Do not attribute the change to a new blocking property alone. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 3: Plastic lid
Task. A magnet lifts a steel pin through a thin plastic lid.
Reasoning. Plastic is between the items but does not stop the interaction at this distance. The controlling idea is the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. Attraction is observed through plastic.
Independent check. Keep the pin contained safely. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 4: Glass jar
Task. A magnet moves an iron object inside a glass jar.
Reasoning. The glass wall and air gap separate them. The controlling idea is the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. The object can respond through the barrier.
Independent check. Do not strike or stress the glass. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 5: Water setup
Task. A magnet outside a cup moves a steel washer in water.
Reasoning. Magnetic interaction crosses the cup wall and water, while drag resists motion. The controlling idea is the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. Movement can still occur.
Independent check. Container, distance and drag all matter. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 6: Aluminium foil
Task. A magnet does not strongly attract a piece of ordinary aluminium foil in the classroom test.
Reasoning. Metal identity does not guarantee strong magnetic attraction. The controlling idea is the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. The foil is not a suitable magnetic target.
Independent check. Compare with iron or steel. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 7: Friction trap
Task. A clip on a rough surface does not move through card.
Reasoning. Friction may exceed the magnetic pull. The controlling idea is the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. No motion alone does not prove the card blocks magnetic force.
Independent check. Reduce friction or test another response. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 8: Distance comparison
Task. The clip moves at 2 mm separation but not 30 mm.
Reasoning. The magnet-object separation changed greatly. The controlling idea is the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. The observable effect weakens with distance.
Independent check. Use identical orientation and objects. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Deepening lab: compare cases, conditions and limits
A method becomes independent when you can say where it applies, where it stops and which change would alter the conclusion. The cases below deliberately vary one structural feature at a time. For each case, pause before the analysis and predict whether the core rule remains available. Then name the exact condition that controls the decision. This is harder than repeating a worked solution, but it is also closer to what an unfamiliar examination item demands.
Deepening case 1: Thin paper
Case. A single sheet adds little distance.
Analysis. Attraction may remain easy to observe. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Measure the baseline gap. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 2: Thick cardboard
Case. Cardboard adds more distance and roughness.
Analysis. Both can reduce motion. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Separate thickness from material. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 3: Plastic bag
Case. A sealed bag can contain small parts while the magnet acts outside.
Analysis. The flexible barrier is non-magnetic. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Avoid swallowing hazards. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 4: Wood strip
Case. A thin wooden strip may allow attraction through it.
Analysis. A thick strip may put the object too far away. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Do not claim wood has switched properties. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 5: Glass plate
Case. Glass is non-magnetic in the classroom sense.
Analysis. The force can act across it when geometry permits. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Handle only safe equipment. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 6: Water depth
Case. Greater water depth often increases separation and drag.
Analysis. Two variables can change together. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Design a controlled container test. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 7: Oil layer
Case. A liquid may change drag without becoming a magnetic shield.
Analysis. Movement evidence depends on resistance. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Keep distance fixed. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 8: Iron barrier
Case. An iron piece can be attracted and can alter the magnetic interaction.
Analysis. It is not a simple non-magnetic comparison. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Classify the barrier first. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 9: Steel can
Case. A ferromagnetic enclosure can redirect magnetic effects and complicate the setup.
Analysis. Do not generalise from paper. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. State material scope. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 10: Compass response
Case. A compass needle can turn without translating across a surface.
Analysis. Rotation is another response to a magnetic field. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Use direction evidence carefully. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 11: Two magnets
Case. Attraction or repulsion occurs depending on poles.
Analysis. A magnetic object test differs from magnet-magnet interaction. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Identify poles. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 12: Weak magnet
Case. A weak classroom magnet may fail at modest distance.
Analysis. Failure does not prove shielding. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Repeat with controlled strength. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 13: Strong magnet
Case. A stronger magnet may act across a larger separation.
Analysis. Strength is an independent variable. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Use safe limits. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 14: Object size
Case. A larger steel object can have more mass and friction.
Analysis. Response is not set by material name alone. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Use matched targets. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 15: Orientation
Case. A bar magnet pole aimed at the object can differ from a sideways orientation.
Analysis. Geometry affects the field and force. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Keep orientation fixed. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 16: Multiple clips
Case. A chain of clips introduces induced magnetism and extra weight.
Analysis. The mechanism becomes more complex. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Start with one object. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 17: Magnetic shielding claim
Case. Special high-permeability materials can redirect fields, but that is beyond ordinary paper/plastic tests.
Analysis. Do not say no material can affect magnetism. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Keep the claim bounded. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 18: Electronics
Case. Magnets can affect some devices and stored data.
Analysis. Safety and separation matter. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Keep experiments away from electronics. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 19: Measurement limit
Case. No visible movement may still coexist with a force too small to overcome friction.
Analysis. Detection method sets the evidence limit. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Use a freely suspended target. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 20: Fair-test table
Case. Record barrier, thickness, total gap, magnet, target, surface and response.
Analysis. Structured records prevent hidden variable changes. Notice that the answer depends on the separation between magnet and magnetic object, including the barrier thickness, while keeping materials and geometry controlled; changing a decorative detail would not be enough to change the reasoning.
Challenge. Repeat trials. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Finish the lab with a blank-page recall. Write the rule, its conditions, one confirming example, one near-miss and one independent check from memory. Compare that page with the article only after finishing. If the rule is correct but the condition is missing, the learning is not yet safe: an overgeneralised rule can produce confident errors. If the condition is correct but no example can be generated, practise construction rather than rereading.
Common misconceptions and targeted repairs
Misconception 1: Non-magnetic means blocking
What the learner may think. A material not attracted by a magnet must stop magnetic force.
Why it fails. Material response and field transmission are different ideas. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Test through the barrier. Use this short test immediately: Does the target respond?
Misconception 2: Barrier becomes magnetic
What the learner may think. Attraction through plastic proves plastic is a magnet.
Why it fails. The magnet interacts with the target across the barrier. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Test the plastic separately. Use this short test immediately: Does it attract a clip alone?
Misconception 3: All metals are magnetic
What the learner may think. Any metal object is attracted strongly.
Why it fails. Many common metals are not strongly attracted in classroom tests. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Identify material. Use this short test immediately: Compare iron with aluminium.
Misconception 4: No motion means no force
What the learner may think. An object that stays still experiences no magnetic interaction.
Why it fails. Friction or weight may exceed the force. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Reduce resistance. Use this short test immediately: Can it rotate or slide freely?
Misconception 5: More sheets prove shielding
What the learner may think. Adding sheets changes only material amount.
Why it fails. It also increases distance and often friction. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Control total separation. Use this short test immediately: What else changed?
Misconception 6: Force is unchanged with distance
What the learner may think. A magnet acts equally strongly at every gap.
Why it fails. Observable magnetic effects generally weaken with greater separation. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Measure distance. Use this short test immediately: At what gap does motion stop?
Graded independent practice
Attempt each item without looking ahead. Write one line that identifies the controlling evidence before writing the final answer. Items 1–3 check recognition, 4–7 require explanation, and the later items change the surface form so that memory alone is insufficient.
Practice 1: Recognition
Question. A clip moves under paper when a magnet moves above. What does this show?
Explained answer. Magnetic force can act through the paper at that separation.
Why this answer earns trust. The clip responds without contact. Transfer variation: Do not claim the paper became magnetic.
Practice 2: Meaning
Question. Does non-magnetic mean magnetic force cannot pass through?
Explained answer. No.
Why this answer earns trust. It describes the material’s own magnetic response, not automatic shielding. Transfer variation: Give a plastic example.
Practice 3: Variables
Question. Why is adding more card not a pure material test?
Explained answer. It increases distance and may change friction.
Why this answer earns trust. Several variables change. Transfer variation: Design a fixed-gap test.
Practice 4: No motion
Question. Give three reasons a clip may not move.
Explained answer. Gap too large, magnet too weak, friction too high, poor orientation or unsuitable target are valid.
Why this answer earns trust. Absence of motion is not one-cause evidence. Transfer variation: Choose a follow-up test.
Practice 5: Metals
Question. Why is aluminium a useful comparison with iron?
Explained answer. It shows that not every metal is strongly attracted.
Why this answer earns trust. Material identity matters. Transfer variation: Keep size similar.
Practice 6: Water
Question. What must be controlled when testing through water?
Explained answer. Container wall, water depth, magnet-object distance, target, orientation and drag conditions.
Why this answer earns trust. Water changes more than one aspect. Transfer variation: Use repeated trials.
Practice 7: Fair test
Question. Test barrier material only. What should stay fixed?
Explained answer. Thickness or total gap, magnet, target, orientation, surface, start position and procedure.
Why this answer earns trust. Controls isolate material. Transfer variation: Name the response measure.
Practice 8: Safety
Question. Why keep strong magnets away from young children and devices?
Explained answer. They can pinch, be swallowed and affect equipment.
Why this answer earns trust. Safety limits override curiosity. Transfer variation: Use suitable supervised materials.
Practice 9: Correction
Question. Correct: The plastic carried the magnetic force and became a magnet.
Explained answer. The magnet interacted with the magnetic target through the non-magnetic plastic; the observation does not show the plastic became a magnet.
Why this answer earns trust. Roles remain separate. Transfer variation: Test plastic alone.
Practice 10: Independent chain
Question. State the mechanism and limits.
Explained answer. A magnet can interact with a magnetic object across a gap and many non-magnetic barriers; the observable response depends on distance, strength, object and friction.
Why this answer earns trust. The claim is precise and bounded. Transfer variation: Apply to thick wood.
Delayed transfer: prove that the learning lasts
Transfer test 1: Barrier matrix
Compare paper, plastic, glass and air at controlled gaps. Do this after a delay, without rereading the worked examples. The purpose is to test retrieval and decision-making, not immediate imitation.
Success criterion. Conclusions separate material from distance. If the criterion is not met, return to the smallest missing decision rather than repeating the entire chapter.
Transfer test 2: Response methods
Test sliding, lifting and compass rotation safely. Do this after a delay, without rereading the worked examples. The purpose is to test retrieval and decision-making, not immediate imitation.
Success criterion. No-motion cases are interpreted with detection limits. If the criterion is not met, return to the smallest missing decision rather than repeating the entire chapter.
Transfer test 3: Delayed explanation
After two days, explain why a clip can move through card without saying the card is magnetic. Do this after a delay, without rereading the worked examples. The purpose is to test retrieval and decision-making, not immediate imitation.
Success criterion. The magnet, barrier and target roles stay distinct. If the criterion is not met, return to the smallest missing decision rather than repeating the entire chapter.
Examination control
1. Read the job before the story. Underline the command and the noun it governs. “Explain the change,” “state the word,” “find the fraction” and “identify the evidence” are different jobs even when the surrounding context is similar.
2. Separate given information from remembered information. Use only the facts supplied for the current task plus secure subject knowledge. Do not let a previous question, a familiar worksheet or an expected pattern silently become new evidence.
3. Write enough working to expose the decision. A marker or teacher should be able to see the relationship that justifies the answer. Extra sentences are not automatically stronger; the strongest working is concise, relevant and checkable.
4. Reserve a different-route check. For language, read the sentence for meaning and grammar. For mathematics, estimate or reverse the operation. For science, check the claim against the stated observation and a conservation or fair-test principle.
5. Stop when the requested job is complete. Unrequested speculation can contradict a correct answer. Add detail only when it explains the mechanism or satisfies another explicit part of the question.
Under time pressure, use a compact four-part margin routine: trigger → evidence → operation → check. Trigger names the feature that activates the method. Evidence identifies the exact words, values or observations allowed. Operation performs the language, mathematical or scientific step. Check asks whether the final statement answers the requested job, preserves units or referents, and avoids a stronger claim than the evidence supports.
A compact error log
After practice, do not record only “careless mistake.” Name the broken decision. Useful labels include trigger missed, evidence imported, relationship reversed, referent lost, unit dropped, operation correct but job wrong, and check repeated the same route. Add one prevention cue beside the label. A short accurate log is more useful than a long emotional account because it tells the learner what to do on the next item.
Review the log after two days and again after a week. Reattempt only one or two representative items first. If the method transfers, move to a mixed set. If it fails, repair the exact link between trigger and operation. This spacing matters because a solution can feel obvious while it is still visible and disappear when the page is closed.
Notes for parents and tutors
Use magnets large enough not to be swallowed and supervise every trial; keep them away from electronics and medical devices.
Ask “what changed besides the barrier?” whenever more layers are added.
Use one steel target and a low-friction surface before comparing materials, so hidden variables do not dominate.
The adult’s most useful question is not “Why were you careless?” but “Which decision did the evidence require?” Ask the learner to point to the controlling word, value, relationship or observation. If the learner can explain that link, reduce support. If the learner cannot, model one example and then change the surface details for the next attempt.
Frequently asked questions
Can magnetic force act through paper?
Yes, when the magnet and magnetic object are close enough.
Does paper become magnetic?
No conclusion like that follows from attraction through it.
Does plastic block magnetism?
Many thin plastics do not stop an observable effect, though distance and setup matter.
Are all metals magnetic?
No. Iron and many steels are attracted strongly; aluminium and copper usually are not in simple tests.
Why does adding layers weaken movement?
It increases separation and may add friction.
What is the key fair-test variable?
Control total magnet-object distance while changing only the intended factor.
Next routes
Return to the complete volume directory to locate the series, use the original PSLE Learning Guide for the foundation route, and continue through PSLE Science for verified subject guidance. The next useful task is a mixed set in which this idea is sometimes relevant and sometimes irrelevant; that is the point at which a learner must choose, not merely copy.