The geothermal gradient is due to
A) decaying radioactive elements that release energy and heat the crust
B) changing patterns of Earth's orbit, tilt, and rotational axis
C) drifting continental landmasses over geologic time
D) heat trapping greenhouse gases in the atmosphere
Correct Answer:
Verified
Q1: Select the event that marks the beginning
Q3: Proxies are used to
A) directly measure temperature
B)
Q4: Select the example of a proxy indicator
Q5: Which proxy indicates a past period of
Q6: Atmospheric greenhouse gases cause the greenhouse effect
Q7: The Milankovitch cycles involve changes in
Q8: Volcanic eruptions
A) release dark soot particles with
Q9: Which is the most significant greenhouse gas
Q10: Most methane emissions arise from
A) animal digestive
Q11: In a computer model that is tested
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