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Earth's magnetic field is generated by moving material in the:

ALower crust
BLofty cloud
CLeafy cover
DLiquid core
Answer & Solution
Correct answer: D. Liquid core
1. Moving charges make a magnetic field. 2. The metal must be able to move. 3. So it is the liquid core. _Source: OpenStax Astronomy 2e, Chapter 8, Earth as a Planet._
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