5G50.10-Curie point

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Equipment:

  • Blowtorch
  • Empty pot
  • Iron ball
  • Bar magnet
  • Metal stand with clamps

Description: A ball of iron is attached to a magnet. Heat the iron near the magnet and it should fall after a few seconds.

Note: Be careful not to heat up the magnet or catch the wood on fire.

Explanation: A ball of iron ordinarily will be attracted to a magnet, but when you heat the
ball to a temperature of at least 176° Fahrenheit (called the Curie point), it loses its ability to be
magnetized. Heat energy scrambles the iron atoms so they can’t line up and create a magnetic
field, thus why the ball falls off of the magnet.

28-F8