Multiple Choice
The heat energy that powers tectonic activity on the surface of Earth originates deep in Earth's core.What is the main reason Earth's core does not cool rapidly as a result?
A) Earth is still contracting gravitationally and converting gravitational potential energy into heat.
B) Convection returns heat energy to the core from the upper mantle.
C) Conduction returns heat energy to the core from the upper mantle.
D) Radioactivity in the core and lower mantle provides additional heat.
Correct Answer:
Verified
Correct Answer:
Verified
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