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How Do Magnets Stick to Metal?

How Do Magnets Stick to Metal?

磁铁为什么能吸住金属?

  1. Magnets have two ends: north and south poles.
  2. They create an invisible force field called a magnetic field.
  3. Only certain metals like iron, nickel, and cobalt respond to it.
  4. Inside these metals, tiny parts called domains line up.
  5. This makes the metal act like a small magnet itself.
  6. Opposite poles pull together; same poles push apart.
  7. Not all metals stick — aluminum and copper do not react.
  8. Heat or hard hits can weaken a magnet’s power.
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