What are the key characteristics of a magnetic field?

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Magnetism is the property of how a material responds when subjected to a magnetic field. The magnetic field is a change in energy within a volume of space. The molecules in a magnet are aligned to all face one way, which gives the magnet its magnetic field. Sometimes the molecules can align permanently, making a permanent magnet, a permanent magnet is typically a ferromagnetic material, such as iron. Temporary magnets molecules only line up for...
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