Question

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

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.

Answer 1

C

Explanation: Hot mantle material rises because it becomes less dense; as it nears the surface it cools, becomes denser, and then sinks back down, driving convection currents that move tectonic plates.