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How Do Magnets Stick to Some Metals?

How Do Magnets Stick to Some Metals?

磁铁为什么能吸住某些金属?

  1. Magnets have two ends: north and south poles.
  2. They create an invisible force field around them.
  3. Only iron, nickel, and cobalt feel this pull.
  4. These metals have tiny magnetic parts inside.
  5. The magnet lines up those parts and pulls them.
  6. Two north poles push each other away.
  7. North and south poles always attract.
  8. Not all metals stick — aluminum and copper do not.
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