Joe follows the procedure below to make a compass.1. Move a magnet from the top of a needle to its point fifty times.2. Lay the needle on a cork that is floating in a bowl of water.3. Observe the direction that the needle points.

Moving a magnet repeatedly along the needle transfers magnetism to it, so the needle becomes magnetized. Floating it on the cork lets it turn freely and point in a direction, like a compass. Therefore, the procedure is meant to magnetize the needle.

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