The sand will be repelled by the magnet. The iron filings will be attracted to the magnet. The sand will be attracted to the magnet. The iron filings will be repelled by the magnet.
I gave my students this multiple choice question: What would happen if a magnet was placed in the center of a plastic bowl containing a mixture of iron filings and sand?

Only one answer is correct among these 4 choices:
- The sand will be repelled by the magnet.
- The iron filings will be attracted to the magnet.
- The sand will be attracted to the magnet.
- The iron filings will be repelled by the magnet.

Could you tell me which one is correct?

The iron filings will be attracted to the magnet.