Reversals of the Earth's Magnetic Polarity

question 65

Multiple Choice

Reversals of the earth's magnetic polarity

• A) occur with a regular periodicity; the next one will happen in about 140 years.
• B) have occurred randomly in the past and represent times when the south magnetic pole was swapped in location with the north magnetic pole.
• C) have occurred randomly in the past and represent times when the earth turned upside-down
• D) are a consequence of major earthquakes.
• E) have not happened since the end of the Paleozoic.

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