1. during the rock cycle, what forms when magma cools?

2.because igneous rocks are extremely hard, they cannot be changed into sedimentary or metamorphic rocks.
a. true
b. false

3. it is possible for sedimentary rock to be changed into __

4. what has to increase for metamorphism to occur?

5. when a rock undergoes heat and pressure, the minerals inside it may line up to form layers.
a. true
b. false