If One Were Able to Measure Earth's Magnetic Field at Some

question 132

Multiple Choice

If one were able to measure Earth's magnetic field at some time,say 400,000 to 600,000 years ago,one would:

• A) find the field to be zero since 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 has today but exactly opposite in direction.

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