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magnetic field of the earth

magnetic field of the earth in Culture

magnetic field of the Earth definition

The magnetic field (see magnetism) that surrounds and permeates the Earth. It is the presence of this field that causes compass needles to line up in a north-south direction. The origin of the Earth's magnetic field is poorly understood at the present time.

The American HeritageĀ® New Dictionary of Cultural Literacy, Third Edition
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