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AssignmentMultiple Choice

Volcanoes

Question 2 • DRHS GA-GSE Earth Systems

Which statement accurately describes the movement of Earth’s plates due to convection currents?

Answer
A
Material near the core cools as heat is transferred toward the crust.
B
Heated materials become denser, causing them to rise toward the surface.
C
As heated material gets closer to the surface, it begins to cool.
D
As materials cool, they become less dense and sink back toward the core.

Explanation

Heat from Earth’s interior warms mantle material, causing it to rise. As that heated material moves closer to the surface, it loses heat and cools. Cooling makes the material denser, so it sinks and the convection cycle continues. Therefore, the accurate statement is “As heated material gets closer to the surface, it begins to cool.”

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