Siti wants to separate a mixture of iron filings and sand. She places a plastic sheet over a magnet and moves it over the mixture. Which property of the plastic sheet allows her to do this?
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Worked Solution
Step 1: Iron filings are magnetic; sand is not.
Step 2: A magnet attracts iron filings.
Step 3: Magnetic force can act through non-magnetic barriers like plastic.
Step 4: This allows the filings to stick to the sheet without touching the magnet directly.
Correct answer: Magnetic force can pass through non-magnetic materials.
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