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Applying the Concepts
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1

Based on its abundance in the earth's crust, most rocks will contain a mineral composed of oxygen and the element
A)sulfur.
B)carbon.
C)silicon.
D)iron.
2

The most useful clue to the identity of a mineral is its
A)color.
B)hardness.
C)streak.
D)crystal structure.
3

The most common rock in the earth's crust is
A)igneous.
B)sedimentary.
C)metamorphic.
D)none of the above.
4

An intrusive igneous rock will have which type of texture?
A)fine-grained
B)coarse-grained
C)neither fine- nor coarse-grained
5

Which igneous rock would have the greatest density?
A)fine-grained granite (rhyolite)
B)coarse-grained granite
C)one composed of nonferromagnesian silicates
D)basalt
6

Which of the following formed from previously existing rocks?
A)sedimentary rocks
B)igneous rocks
C)metamorphic rocks
D)All of the above are correct.
7

Rocks making up the ocean basins and much of the earth's interior have the same chemical composition as
A)granite.
B)basalt.
C)halite.
D)water.
8

Sedimentary rocks are formed by the processes of compaction and
A)pressurization.
B)melting.
C)cementation.
D)heating, but not melting.
9

A rock might be a metamorphic rock if it has
A)large crystals that can be seen with the unaided eye.
B)strata.
C)a composition consisting of more than two minerals.
D)foliation.
10

The greatest extent of metamorphic changes has occurred in
A)gneiss.
B)schist.
C)slate.
11

Which type of rock probably existed first, starting the rock cycle?
A)metamorphic
B)igneous
C)sedimentary
D)All of the above are correct.





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