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Earth Sciences 7 Online
OpenStudy (mouth4war):

Earth's magnetic field is trapped in rocks as lava cools down. What do the rocks tell us? Question 7 options: The earth's magnetic pole has flipped many times in the past. The earth's magnetic pole has flipped once in the distant past. The earth's magnetic pole is stable. The geographic North Pole moves around.

OpenStudy (legomyego180):

A

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