fill in the blank to complete each statement.
6. the metamorphic rock _________________ usually forms when limestone is subjected to heat and pressure deep beneath the surface.
7. because the foliated metamorphic rock _________________ splits easily into flat pieces, it is used for roofing material.
8. any rock formed when another rock is changed by heat or _________________ i metamorphic rock.
9. geologists classify metamorphic rocks according to the _________________ of t grains making up the rocks.
10. quartzite forms when the quartz particles in _________________ recrystallize.

Question

Accepted Answer

### Question 6
# Brief Explanations:
Metamorphic rocks form from existing rocks under heat and pressure. Limestone (a sedimentary rock) metamorphoses into marble. So the blank should be "marble".
# Answer:
marble

### Question 7
# Brief Explanations:
Foliated metamorphic rocks have a layered appearance. Slate is a foliated metamorphic rock that splits into flat pieces, suitable for roofing. So the blank is "slate".
# Answer:
slate

### Question 8
# Brief Explanations:
Metamorphic rocks are formed when rocks are changed by heat or pressure (or both). The definition of a metamorphic rock involves change due to heat and pressure. So the blank is "pressure".
# Answer:
pressure

### Question 9
# Brief Explanations:
Geologists classify metamorphic rocks based on the arrangement (or texture) of the mineral grains. Foliated and non - foliated are based on grain arrangement. So the blank is "arrangement (or texture)".
# Answer:
arrangement (or texture)

### Question 10
# Brief Explanations:
Quartzite is a metamorphic rock that forms when the quartz particles in sandstone (a sedimentary rock composed mainly of quartz sand) recrystallize under heat and pressure. So the blank is "sandstone".
# Answer:
sandstone

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