What effect does an increase in pressure have on the temperature at which rock melts?
A) It is not yet known-the temperature needed to melt rock has not yet been achieved in the laboratory.
B) An increase of pressure increases the melting temperature.
C) An increase of pressure has no effect on the melting temperature because the melting temperature is independent of pressure.
D) An increase of pressure lowers the melting temperature.

Question

Quizplus · Accepted Answer

An increase in pressure increases the melting temperature of rock. This is because under higher pressure, the molecules in the rock are forced closer together, which requires more heat to overcome the increased forces holding the molecules in their solid state, thus raising the melting point.

What Effect Does an Increase in Pressure Have on the Temperature