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How Do Magnets Stick to Some Metals?

How Do Magnets Stick to Some Metals?

磁铁为什么会吸住某些金属?

  1. Magnets have two ends: north and south poles.
  2. They create an invisible force field around them.
  3. Iron, nickel and cobalt feel this magnetic pull.
  4. Their atoms can line up with the magnet’s field.
  5. Other metals like aluminum or copper do not react.
  6. Opposite poles attract; same poles push apart.
  7. Some magnets stay strong for years.
  8. Heat or hard drops can weaken them.
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