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Earth's Magnetism

Geomagnetism refers to the study of earth's magnetism. Generation of the magnetic field appears to be related to the motion of fluid upon the earth. "It electrically conducts the material within the earth and the planet acts as a self-exciting dynamo." [Encarta Encyclopedia 1998] The conducting material and the geomagnetic field may mutually control each other. Study of this theory is called magnetohydrodynamics or hydromagnetics. The study of how the magnetic field ha changed throughout the earth's history, called paleomagnetism, provided the first strong theories of plate tectonics.

More proof of this theory is the fact that the surface of the earth has a nega



Some common words found in the essay are:
Encarta Encyclopedia, Magnetism Geomagnetism, magnetic field, magnetic poles, negative charge, earth's magnetic poles, earth's magnetism, earth's magnetic, magnetic pole, poles switch, secular variation,
Approximate Word count = 463
Approximate Pages = 2 (250 words per page double spaced)

  

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