At what depth does the transition from the upper mantle to the lower mantle occur?
A) approximately 100 kilometers
B) approximately 3000 kilometers
C) approximately 700 kilometers
D) approximately 5000 kilometers
Correct Answer:
Verified
Q22: Approximately how often does Earth's magnetic field
Q23: Seismic wave speeds increase with
A)decreasing density and
Q24: According to a recent hypothesis,mantle plumes that
Q25: What drives plate tectonics?
A)erosion
B)solar energy
C)thermal conduction
D)thermal convection
Q26: Which of the following regions is hottest?
A)the
Q28: Who first proposed that Earth acted as
Q29: The boundary between the mantle and the
Q30: The temperature at the center of Earth
Q31: Based on seismic tomographic images,how deep do
Q32: Which of the following regions is the
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