1 • opposite poles attract • like poles repel • the ends of magnets are
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Magnetism‐‐What do we know? • opposite poles attract • like poles repel • the ends of magnets are called poles • there is a North pole and a South pole • Magnets attract 3 metals: iron, nickel, and cobalt • The Earth is a giant magnet! • Earth has an iron core. • All magnets, including Earth, have a magnetic field. • Animals use this magnetic field to migrate. • Moving electrons cause magnetism. • A compass needle moves because of a magnetic field. Apr 24­12:40 PM Apr 24­8:44 AM 1
