Multiple Choice
The Geologic Time Scale defines eras in terms of
A) major worldwide extinctions of life on Earth.
B) reversals in Earth's magnetic field.
C) the beginning of the radioactive decay of elements in minerals.
D) major plate tectonic events.
Correct Answer:
Verified
Correct Answer:
Verified
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Q2: The fossilization process by which the original
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Q4: Reptiles were the dominant life form in
Q5: Which of the following is not a
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