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Magnetic Storm
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Viewing Ideas
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Before Watching
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Demonstrate how magnetism is a property that can be changed.
Drag a paper clip along a bar magnet 15 times so that the paper
clip becomes magnetized. Use this paper clip to pick up another
paper clip. Then, bang the magnetized paper clip on the table.
Now try to pick up the other paper clip again. (See Activity
Answer on page 3 for an explanation of this concept.)
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Discuss with your students the difference between the geographic
North Pole and the magnetic North Pole. (The geographic North
Pole is the point at 90 degrees North latitude. The magnetic
North Pole is where the magnetic field lines are vertical and
enter Earth, presently at about 82 degrees North latitude and
112 degrees West longitude.)
After Watching
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Have a class discussion on how the weakening and shifting
magnetic field may affect life on Earth. (With a weakened
magnetic field, more radiation would enter Earth's atmosphere
resulting in increased deaths from cancer.)
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Discuss with students how Earth changes over time. The magnetic
field is not the only thing that changes. Ask them to think of
other examples of change. (Oceans have become mountains, the
average global temperature has fluctuated, and the amount of
carbon dioxide in the atmosphere has changed.)
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