a. Anthracite is a metamorphic type of ________________ .

b. Heat, pressure, and ______________ turn igneous and sedimentary rocks into metamorphic rocks.

c. Fluids in rocks _________________________ up metamorphism.

d. ____________________ rocks recrystallize to form metamorphic rocks.

e. Minerals are just __________________ to recrystallize in low-grade metamorphic rocks.

f. Minerals in metamorphic rocks _____________________when heat and pressure is exerted on rocks.

g. Metamorphic rocks are rocks of ______________________ .

h. Rocks that _______________________ due to heat and pressure become igneous rocks.

i. Heat and pressure usually work to form new _________________________ rocks.

j. Graphite and ______________________ are both made of pure carbon.

2. Describe the formation process of igneous rocks.

3. What is a metamorphic series?

4. What is regional metamorphism?

5. What is the difference between low-grade and high-grade metamorphic rocks?