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1.4.2 Test (CST): Laying the Groundwork

Question 9 of 15

About how often do Earth's magnetic poles reverse?

A. Every 22 years
B. Every 100 million years
C. Every billion years
D. Every 250,000 years

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Answer :

GinnyAnswer

Final answer:

Earth's magnetic poles reverse approximately every 200,000 years in geomagnetic reversal events.


Explanation:

Earth's magnetic poles reverse approximately every 200,000 years, a phenomenon known as geomagnetic reversals. These events involve the North and South geomagnetic poles switching locations, causing a change in the Earth's magnetic field. Reversals can vary in duration from a few thousand years to over 30 million years, with the most recent reversal occurring around 780,000 years ago.


Learn more about Geomagnetic Reversals here:

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