How to Perform in PSLE | Learner’s Guide Vol 0871 | Science: Breaking a Bar Magnet Produces Smaller Magnets With Both North and South Poles

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1. State the outcome precisely

When a bar magnet is broken into two pieces, each piece becomes a smaller magnet with a north pole and a south pole. The broken faces become parts of new pole arrangements.

Build the explanation by naming the original magnet and break position and the two new pieces. A remembered keyword is not enough: connect the observation to the mechanism and identify what would have to change for the conclusion to change.

Repair the nearest misconception by checking north and south poles on each piece and returning to tests of attraction repulsion and free alignment. State why the tempting alternative is too strong, incomplete or about a different stage.

• Check the original magnet and break position.
• Check the two new pieces.
• Check north and south poles on each piece.
• Check tests of attraction repulsion and free alignment.

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CHAPTER 2 OF 12 · Back to contents

2. Do not treat poles as detachable ends

A magnetic pole is not a bead fixed only to an outer tip. The magnetised material acts together, so creating a new end creates a new two-pole magnet rather than a pole-free piece.

Build the explanation by naming the original magnet and break position and the two new pieces. A remembered keyword is not enough: connect the observation to the mechanism and identify what would have to change for the conclusion to change.

Repair the nearest misconception by checking north and south poles on each piece and returning to tests of attraction repulsion and free alignment. State why the tempting alternative is too strong, incomplete or about a different stage.

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3. Keep attraction and repulsion evidence separate

Each piece can attract suitable magnetic material, but pole identification requires interaction with a known magnetic pole. Attraction alone cannot distinguish north from south.

Build the explanation by naming the original magnet and break position and the two new pieces. A remembered keyword is not enough: connect the observation to the mechanism and identify what would have to change for the conclusion to change.

Repair the nearest misconception by checking north and south poles on each piece and returning to tests of attraction repulsion and free alignment. State why the tempting alternative is too strong, incomplete or about a different stage.

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4. Use a free-suspension check

If a broken piece is light enough and freely suspended away from disturbances, it can align approximately north–south, showing that it behaves as a magnet.

Build the explanation by naming the original magnet and break position and the two new pieces. A remembered keyword is not enough: connect the observation to the mechanism and identify what would have to change for the conclusion to change.

Repair the nearest misconception by checking north and south poles on each piece and returning to tests of attraction repulsion and free alignment. State why the tempting alternative is too strong, incomplete or about a different stage.

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5. Track the new facing poles

At the break, one new face on one piece and the opposing new face on the other piece have opposite pole character. Rejoining the pieces in their original arrangement can therefore attract.

Build the explanation by naming the original magnet and break position and the two new pieces. A remembered keyword is not enough: connect the observation to the mechanism and identify what would have to change for the conclusion to change.

Repair the nearest misconception by checking north and south poles on each piece and returning to tests of attraction repulsion and free alignment. State why the tempting alternative is too strong, incomplete or about a different stage.

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6. Do not promise equal strength or size

Unequal pieces need not have equal dimensions or identical magnetic behaviour. The reliable conclusion is that each magnetised piece has both pole types.

Build the explanation by naming the original magnet and break position and the two new pieces. A remembered keyword is not enough: connect the observation to the mechanism and identify what would have to change for the conclusion to change.

Repair the nearest misconception by checking north and south poles on each piece and returning to tests of attraction repulsion and free alignment. State why the tempting alternative is too strong, incomplete or about a different stage.

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7. Control the investigation

Mark original ends before breaking in a safe demonstration or use prepared pieces. Test with a known magnet, keep distances similar and avoid nearby magnetic interference.

Build the explanation by naming the original magnet and break position and the two new pieces. A remembered keyword is not enough: connect the observation to the mechanism and identify what would have to change for the conclusion to change.

Repair the nearest misconception by checking north and south poles on each piece and returning to tests of attraction repulsion and free alignment. State why the tempting alternative is too strong, incomplete or about a different stage.

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8. Control examination answers

Draw both pieces, label north and south on each and explain that no isolated pole was obtained. Do not label one whole piece N and the other whole piece S.

Build the explanation by naming the original magnet and break position and the two new pieces. A remembered keyword is not enough: connect the observation to the mechanism and identify what would have to change for the conclusion to change.

Repair the nearest misconception by checking north and south poles on each piece and returning to tests of attraction repulsion and free alignment. State why the tempting alternative is too strong, incomplete or about a different stage.

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CHAPTER 9 OF 12 · Back to contents

9. Worked examples

Worked case 1: A bar magnet labelled N–S is broken in half. How many magnets result?

Controlled answer. Two smaller magnets. Each piece has both pole types.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Draw the four pole labels. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “Two smaller magnets” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 2: Does the piece from the north end contain only a north pole?

Controlled answer. No. Its new broken face acts as a south pole, giving the piece both poles.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Test with a known pole. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “No” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 3: Can breaking isolate a south pole?

Controlled answer. No. Each magnetised piece forms a new north–south pair.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Break a piece conceptually again. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “No” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 4: Repair: the left fragment is N and the right fragment is S.

Controlled answer. Each fragment has an N end and an S end. A whole magnet is not one single pole.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Label every end. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “Each fragment has an N end and an S end” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 5: Why might the original broken faces attract when brought together?

Controlled answer. They have opposite pole character in the original alignment. Opposite poles attract.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Reverse one piece and predict. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “They have opposite pole character in the original alignment” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 6: Can attraction to iron identify which end is north?

Controlled answer. No. Both magnetic poles attract unmagnetised iron.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Use a known magnet pole. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “No” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 7: What does repulsion show?

Controlled answer. Like known poles are facing. Repulsion is a decisive pole test when one pole is known.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. State why attraction is less decisive. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “Like known poles are facing” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 8: How can free suspension help?

Controlled answer. Each piece can align north–south if it is a functioning magnet. The direction test shows magnetic alignment.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Control friction and interference. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “Each piece can align north–south if it is a functioning magnet” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 9: If one piece is smaller, must it have only one pole?

Controlled answer. No. Size does not remove the two-pole structure.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Mark both ends. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “No” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 10: Does every random iron fragment automatically become a magnet?

Controlled answer. No. The claim concerns pieces of an already magnetised bar that retain magnetisation.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Use an unmagnetised control. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “No” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 11: Why mark the original poles first?

Controlled answer. It allows the new pole arrangement to be predicted and checked. Without labels, orientation can be confused.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Create a before-and-after diagram. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “It allows the new pole arrangement to be predicted and checked” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

Worked case 12: If a piece is broken again, what happens?

Controlled answer. Each new piece still has north and south poles. Further division does not yield an isolated pole in this model.

Mechanism. Identify the exact relationship, apply the relevant rule and preserve every stated condition. A surface clue may be compatible with several explanations, so the answer must show what makes this case decisive.

Misconception repair. Do not turn partial evidence into complete proof. Name the closest wrong answer, identify its missing condition and explain why the observed evidence supports the narrower conclusion.

Transfer. Label three pieces. Solve the altered case from the mechanism rather than copying the previous wording.

Reverse construction. Begin with the controlled answer “Each new piece still has north and south poles” and invent a fresh prompt that would justify it for the same reason. Then change one decisive condition to create a near-nonexample. This reverse task checks whether the learner owns the boundary rather than merely recognising the original sentence.

Explanation standard. A complete explanation names the observation, connects it to the rule and limits the conclusion to what follows. It should remain valid if decorative details are removed. If the explanation depends on the story topic instead of the decisive relation, rebuild it.

Audit. Recheck the original magnet and break position, the two new pieces, north and south poles on each piece, tests of attraction repulsion and free alignment. Decide whether the evidence proves the conclusion or only supports a limited statement.

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CHAPTER 10 OF 12 · Back to contents

10. Independent practice

Practice 1: What observation is stronger than simple attraction?

Explained answer. Repulsion with a known like pole. Only magnets can show pole-specific repulsion in the school test.

Delayed transfer. Explain the control. Cover the answer later and rebuild the chain.

Control question. Which exact condition does the nearest wrong answer miss? State it before checking.

Extension. Change one decisive feature while keeping the story similar. Explain why the conclusion now stays or changes.

Independent proof. Restate the answer without copying its wording. Your version must identify the evidence, the governing relationship and the boundary of the claim. Then write one fact that would be relevant but still insufficient on its own. This separates explanation from repetition.

Delayed comparison. Save this item beside the near-nonexample you created. On the next attempt, compare them before answering and point to the single feature that controls the difference. If more than one feature changed, revise the pair so the comparison stays fair.

Practice 2: Could the pieces lose some magnetisation during rough treatment?

Explained answer. Yes. Handling may weaken the observed effect, but it does not turn an intact magnet fragment into an isolated pole.

Delayed transfer. Separate strength from pole structure. Cover the answer later and rebuild the chain.

Control question. Which exact condition does the nearest wrong answer miss? State it before checking.

Extension. Change one decisive feature while keeping the story similar. Explain why the conclusion now stays or changes.

Independent proof. Restate the answer without copying its wording. Your version must identify the evidence, the governing relationship and the boundary of the claim. Then write one fact that would be relevant but still insufficient on its own. This separates explanation from repetition.

Delayed comparison. Save this item beside the near-nonexample you created. On the next attempt, compare them before answering and point to the single feature that controls the difference. If more than one feature changed, revise the pair so the comparison stays fair.

Practice 3: What should a diagram never show?

Explained answer. A fragment with only N and no S, or only S and no N. That would claim an isolated pole.

Delayed transfer. Repair the diagram. Cover the answer later and rebuild the chain.

Control question. Which exact condition does the nearest wrong answer miss? State it before checking.

Extension. Change one decisive feature while keeping the story similar. Explain why the conclusion now stays or changes.

Independent proof. Restate the answer without copying its wording. Your version must identify the evidence, the governing relationship and the boundary of the claim. Then write one fact that would be relevant but still insufficient on its own. This separates explanation from repetition.

Delayed comparison. Save this item beside the near-nonexample you created. On the next attempt, compare them before answering and point to the single feature that controls the difference. If more than one feature changed, revise the pair so the comparison stays fair.

Practice 4: Why keep test distances similar?

Explained answer. Magnetic effect changes with distance. A fair comparison controls separation.

Delayed transfer. Design a simple data table. Cover the answer later and rebuild the chain.

Control question. Which exact condition does the nearest wrong answer miss? State it before checking.

Extension. Change one decisive feature while keeping the story similar. Explain why the conclusion now stays or changes.

Independent proof. Restate the answer without copying its wording. Your version must identify the evidence, the governing relationship and the boundary of the claim. Then write one fact that would be relevant but still insufficient on its own. This separates explanation from repetition.

Delayed comparison. Save this item beside the near-nonexample you created. On the next attempt, compare them before answering and point to the single feature that controls the difference. If more than one feature changed, revise the pair so the comparison stays fair.

Practice 5: What does rejoining prove by itself?

Explained answer. Only the interaction of the facing ends under that orientation. It does not measure full magnetic strength.

Delayed transfer. Add a second test. Cover the answer later and rebuild the chain.

Control question. Which exact condition does the nearest wrong answer miss? State it before checking.

Extension. Change one decisive feature while keeping the story similar. Explain why the conclusion now stays or changes.

Independent proof. Restate the answer without copying its wording. Your version must identify the evidence, the governing relationship and the boundary of the claim. Then write one fact that would be relevant but still insufficient on its own. This separates explanation from repetition.

Delayed comparison. Save this item beside the near-nonexample you created. On the next attempt, compare them before answering and point to the single feature that controls the difference. If more than one feature changed, revise the pair so the comparison stays fair.

Practice 6: What is the nearest misconception?

Explained answer. Treating the original N and S labels as two detachable substances. Poles describe the magnet’s paired behaviour.

Delayed transfer. Use the repeated-breaking argument. Cover the answer later and rebuild the chain.

Control question. Which exact condition does the nearest wrong answer miss? State it before checking.

Extension. Change one decisive feature while keeping the story similar. Explain why the conclusion now stays or changes.

Independent proof. Restate the answer without copying its wording. Your version must identify the evidence, the governing relationship and the boundary of the claim. Then write one fact that would be relevant but still insufficient on its own. This separates explanation from repetition.

Delayed comparison. Save this item beside the near-nonexample you created. On the next attempt, compare them before answering and point to the single feature that controls the difference. If more than one feature changed, revise the pair so the comparison stays fair.

Practice 7: How should the answer be worded?

Explained answer. Each broken piece is a smaller magnet with both a north and a south pole. This states the conserved two-pole structure clearly.

Delayed transfer. Add supporting evidence. Cover the answer later and rebuild the chain.

Control question. Which exact condition does the nearest wrong answer miss? State it before checking.

Extension. Change one decisive feature while keeping the story similar. Explain why the conclusion now stays or changes.

Independent proof. Restate the answer without copying its wording. Your version must identify the evidence, the governing relationship and the boundary of the claim. Then write one fact that would be relevant but still insufficient on its own. This separates explanation from repetition.

Delayed comparison. Save this item beside the near-nonexample you created. On the next attempt, compare them before answering and point to the single feature that controls the difference. If more than one feature changed, revise the pair so the comparison stays fair.

Practice 8: State the full explanation.

Explained answer. Breaking creates new ends but not isolated poles, so each retained magnetised fragment behaves as a complete smaller magnet with N and S poles. Use known-pole tests and free suspension to check behaviour.

Delayed transfer. Apply to an off-centre break. Cover the answer later and rebuild the chain.

Control question. Which exact condition does the nearest wrong answer miss? State it before checking.

Extension. Change one decisive feature while keeping the story similar. Explain why the conclusion now stays or changes.

Independent proof. Restate the answer without copying its wording. Your version must identify the evidence, the governing relationship and the boundary of the claim. Then write one fact that would be relevant but still insufficient on its own. This separates explanation from repetition.

Delayed comparison. Save this item beside the near-nonexample you created. On the next attempt, compare them before answering and point to the single feature that controls the difference. If more than one feature changed, revise the pair so the comparison stays fair.

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CHAPTER 11 OF 12 · Back to contents

11. Delayed transfer

On day one, solve clear examples. On day three, mix examples, near-nonexamples and incomplete evidence. On day seven, solve without headings or a word bank. Delay reveals whether the method can be reconstructed independently.

Keep an error log for the first failed stage: reading, representation, rule, execution or checking. The earliest failure identifies the repair.

Interleave this skill with neighbouring ideas that share vocabulary. Classify each item only after naming the distinguishing condition.

In timed work, mark the relationship, apply the rule, write the conclusion and audit one condition. If checking changes the answer, record the overlooked feature.

Create a teach-back card with a near-nonexample on the front and the repaired mechanism on the back. Explain why the tempting answer fails.

Finish with one basic example, one boundary case and one transfer case. Supply explanations that a classmate can verify.

For a second delayed test, reverse the direction: start from a conclusion and invent evidence that would justify it, then evidence that would be insufficient. This exposes the boundary between relevance and proof.

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CHAPTER 12 OF 12 · Back to contents

12. Family guidance and FAQs

Guidance for parents and tutors

Ask for the decisive condition before confirming the answer. Use prompts such as “What exactly happened?”, “Which stage or meaning is this?” and “What would prove it?”

Fade support from labelled examples to mixed questions and delayed open response. Independent retrieval after time and topic change is the target.

Praise precise claim control. Narrowing an answer when evidence is incomplete is scientific and academic strength.

Frequently asked questions

Should I memorise the rule?

Memorise the compact rule, then practise examples and near-nonexamples so the conditions remain visible.

What if two answers seem possible?

Return to the exact relationship and choose the option satisfying every stated condition without adding facts.

Why delay practice?

Immediate repetition may depend on the recent explanation; delay tests reconstruction.

How should an error be corrected?

Name the first failed stage and practise it with a changed example.

When is the skill ready?

When the learner can explain, apply and transfer it after a delay.

What is the final audit?

Check relationship, mechanism, claim strength and whole-question fit.

Next routes

Continue at the Science learning hub or return to the series directory.

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