The earth’s mantle is made of a dense thick material that causes movement of crustal plates. Crustal plate movement occurs because the mantle flows as a result of uneven heating inside the mantle. Very hot material deep in the mantle creates _____________ that rise, then cool, then sink, and then heat again, with the cycle repeating.

Question

Responses

A magma flowsmagma flows

B magma currentsmagma currents

C magnetic wavesmagnetic waves

D convection currentsconvection

Answer 1

The correct response is:

D convection currents

So the completed sentence would read: "Very hot material deep in the mantle creates convection currents that rise, then cool, then sink, and then heat again, with the cycle repeating."