Download Igneous Rock Quiz - cK-12

Igneous Rock Quiz
1) Igneous rocks are classified by their
a) Composition and density.
b) Density and texture.
c) Texture and composition.
d) None of these.
2) What are the properties of mafic rock?
a) High density.
b) Dark color.
c) Contains olivine.
d) All of the above.
3) Ultramafic igneous rocks have the lowest amount of silica of any igneous rocks.
a) True
b) False
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4) The composition of an igneous rock is related to the rock’s
a) Crystal size.
b) Density.
c) Location where it formed.
d) All of these.
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5) The mineral quartz is likely to be found in __________ rocks.
a) ultramafic
b) mafic
c) intermediate
d) felsic
6) Granite is a type of felsic rock.
a) True
b) False
7) Which of these minerals or rocks are ultramafic?
a) Komatiite
b) Olivine
c) Peridotite
d) All of the above
8) If you were trying to identify a light colored igneous rock with tiny crystals, you
would look at these rock types
a) Mafic Intrusive
b) Mafic extrusive
c) Felsic intrusive
d) Felsic extrusive
9) Granite and andesite have the same composition but different texture.
a) True
b) False
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10) Gabbro and basalt have the same composition but different texture.
a) True
b) False
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