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Magnets, Iron, and Poles |
3
Magnets
, Iron
Poles
and
Over 2,500 years ago, scientists in ancient Greece made an
astonishing discovery: Chunks of certain rocks exert a
mysterious power over things made of iron. Since these rock
chunks were primarily found near the ancient town of Magnesia
in Asia Minor, they were called magnets. Today, magnets play an
important role in many everyday and technical devices. You may
know about magnetic closures on kitchen cupboard doors, for
example. But you'll also find magnets in speakers, in bicycle
dynamos, and in multiple locations in cars.
Now it's time to learn about the mysterious nature of magnets...
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