A student conducted a scientific investigation on the magnetic properties of iron. She used a magnet to try to pick up iron nails.After making several observations, which question can she answer?

By trying different parts of the magnet with the iron nails, the student can observe which part attracts or picks up the most nails. That answers which part of a magnet is strongest at attracting iron. The other questions require studying how iron changes over time or learning about the purpose of studying magnetic fields.

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