Like other solid bodies in the solar system, Earth's surface was kept molten by:
A) radioactivity.
B) differentiation.
C) convection.
D) bombardment by small bodies.
E) the solar nebula.
Correct Answer:
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Q42: When water vapor condenses out at the
Q43: Chlorofluorocarbons are primarily responsible for:
A)global warming.
B)convection.
C)the greenhouse
Q44: Within Earth's atmosphere the ozone layer is
Q45: The greenhouse effect works by trapping:
A)incoming ultraviolet
Q46: In noting that our world is "differentiated,"
Q48: We determine the structure of the Earth's
Q49: Seismic waves are most useful for mapping:
A)the
Q50: Within Earth's atmosphere, in which layer does
Q51: What event triggered the dramatic increase in
Q52: Earth's interior has been heated by 3
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