In you were able to measure Earth's magnetic field at some time, say, 100,000 to 200,000 years ago, you would:
A) find the field to be zero because Earth's field is a relatively recent development.
B) certainly find the field to be exactly what it is today.
C) most likely find the field to be quite different in magnitude from what it is today.
D) certainly find the field to be the same magnitude it is today, but exactly opposite in direction.
Correct Answer:
Verified
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