What Causes the Earth's Magnetism?

Answer

The motions of the ions within the planet's liquid core cause the earth's magnetism. The Earth has a strong magnetic field that can be detected by a wide range of instruments such as compasses utilized in navigation. This field is not constant and it reverses from time to time so that a compass points south instead of north.
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The core of the Earth is made up of liquid iron and this is what creates the Earth's magnetic field. Without the magnetic field, life on Earth would not be possible. Surprisingly,
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