Question

Which is needed to turn an igneous rock or sedimentary rock into a metamorphic rock? erosion and deposition
erosion and deposition

freezing and cementation
freezing and cementation

heat and pressure
heat and pressure

melting and cooling

Answer 1

To turn an igneous rock or sedimentary rock into a metamorphic rock, **heat and pressure** are needed. Thus, the correct answer is:

**heat and pressure**.