Earth's magnetic field

A. has reversed itself many times.
B. is centered at Earth's core.
C. never appreciably changes.
D. both B and C


Answer: A

Environmental & Atmospheric Sciences

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A) institutionalized language. B) creolized language. C) scheduled language. D) part of the Received Pronunciation standards. E) extinct language.

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A mean annual temperature of ____________________ oC (64.4oF) is used in the Köppen system to distinguish between low-latitude and middle-latitude deserts and steppes

Fill in the blank(s) with correct word

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Climate change involves

A. changes in precipitation. B. decreasing temperatures. C. increasing temperatures. D. All of the above.

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