Rocks can begin to melt if
A)a decrease in pressure results in a sufficient decrease in the rock's melting point.
B)the rock's water content increases thereby decreasing the rock's melting point.
C)heated by rising magma from the Earth's interior.
D)all of the above.
E)none of the above.

Question

Quizplus · Accepted Answer

All three options are possible ways for rocks to start melting. A decrease in pressure can lower the rock's melting point, allowing it to melt even if the temperature remains the same. The addition of water in rocks can also lower the melting point, making it more susceptible to melting. And finally, if they come into contact with hotter magma, the rocks can melt due to the transfer of heat energy. Therefore, the correct answer is D, all of the above.

Rocks Can Begin to Melt If