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Magnetism

Magnetism. MAGNETISM. Click for more info. 1. magnet. any material that attracts iron. regions in a magnet where magnetic force is strongest (labeled N and S). 2. poles. 3. magnetic force. attractive or repulsive between the poles of magnets like poles repel o pposite poles attract.

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Magnetism

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  1. Magnetism

  2. MAGNETISM Click for more info 1. magnet • any material that attracts iron • regions in a magnet where magnetic force is strongest (labeled N and S) 2. poles 3. magnetic force • attractive or repulsive between the poles of magnets • like poles repel • opposite poles attract

  3. MAGNETISM Click for more info 4. magnetic field • the space around a magnet where its force will affect objects 5. field lines • lines showing where the magnetic field is strongest • drawn closer together around poles (where the field is strongest)

  4. MAGNETISM 6. What causes magnetism? • electrons in motion • Individual electrons spin • In most atoms, electrons spin in pairs in opposite directions • In iron, there are 4 unpaired electrons

  5. MAGNETISM Even the Earth itself acts as a giant magnet thanks to its magnetic core!

  6. MAGNETISM Click for more info • small areas in a magnetic substance where atomic magnetic fields line up in the same direction • In an unmagnetized object, all the magnetic domains point in different directions • Once magnetized, all like magnetic poles line up and point in the same direction 7. magnetic domains

  7. MAGNETISM Click for more info 8. Ferromagnetic materials • easily magnetized, but may not retain its magnetism for long • Examples: • Iron • Nickel • Cobalt

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