Earth Science Geology, the Environment, and the Universe

Chapter 5: Igneous Rock

Multiple Choice Quiz

1
According to the figure, what type of rocks can include quartz?
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A)peridotite
B)granite
C)gabbro
D)basalt
2
According to the figure, what types of minerals are ultramafic?
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A)feldspar and biotite
B)pyroxine and olivine
C)amphibole and pyronene
D)feldspar and quartz
3
According to the map shown in the figure, which area of Earth contains the highest concentrations of quartz and feldspars?
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A)North America
B)the west coast of the U.S.
C)the Pacific Ocean
D)Hawaii
4
Granite is an example of __________ rock.
A)an extrusive igneous
B)a volcanic ash
C)an intrusive igneous
D)a partially melted
5
Peridotite and dunite have __________ compositions
A)felsic
B)mafic
C)ultramafic
D)intermediate
6
What branch of Bowen's reaction series cools with a continuous change in composition?
A)the iron-magnesium groups
B)the carbonates
C)the feldspars
D)the silica chains
7
What is an example of an igneous ore deposit?
A)metal-rich quartz veins
B)placer deposits
C)hydrothermal deposits
D)porphyritic deposits
8
What is the last mineral to form on the left branch of Bowen's reaction series?
A)pyroxene
B)feldspar
C)olivine
D)quartz
9
What process explains why a molten magma often is a mix of molten rock and crystals?
A)plate tectonics
B)melting points
C)partial melting
D)Bowen's reaction series
10
Which is not a compositional classification of a magma?
A)basaltic
B)rhyolitic
C)andesitic
D)phaneritic
11
Which rock shown in the figure cooled the fastest?
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A)fine-grained
B)porphorytic
C)glassy
D)coarse-grained
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