Suppose We Had a Device That Allowed Us to See

Suppose we had a device that allowed us to see Earth's interior. If we looked at a typical region of the mantle, what would we see happening?

A) Not much-on human time scales, the mantle looks like solid rock
B) Hot molten rock rising upward throughout the mantle and cool, solid rock falling downward
C) A rapid, up and down churning of the material in the mantle
D) Dense metals falling downward while low-density rock rises upward

Correct Answer:

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