Why is the outer core the source of Earth’s magnetic field? (a) Moving liquid iron particles there form an electric current, and an electric current always produces a magnetic field. (b) It has north...


Why is the outer core the source of Earth’s magnetic field?


(a) Moving liquid iron particles there form an electric current, and an electric current always produces a magnetic field.


(b) It has north and south magnetic poles that reverse over time.


(c) It contains iron, a magnetic material.

Nov 20, 2021
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