Identify forces and describe the motion of objects.
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Recognize that magnets can produce motion by attracting some materials (e.g., steel) and have no effect on others (e.g., plastics).
Describe how magnets have poles (N and S) and that like poles repel each other while unlike poles attract.
Observe that some forces produce motion without objects touching (e.g., magnetic force on nails).
Describe motion on different time scales (e.g., the slow motion of a plant toward light, the fast motion of a tuning fork).