Section #: 5.2
Classifying Igneous Rock
Practice Test
1.
Which rock shown in the figure cooled the fastest?
a.
glassy
b.
coarse-grained
c.
fine-grained
d.
porphorytic
Hint
2.
According to the map shown in the figure, which area of Earth contains the highest concentrations of quartz and feldspars?
a.
North America
b.
Hawaii
c.
the Pacific Ocean
d.
the west coast of the U.S.
Hint
3.
What is an example of an igneous ore deposit?
a.
porphyritic deposits
b.
metal-rich quartz veins
c.
hydrothermal deposits
d.
placer deposits
Hint
4.
According to the figure, what types of minerals are ultramafic?
a.
feldspar and quartz
b.
feldspar and biotite
c.
amphibole and pyronene
d.
pyroxine and olivine
Hint
5.
According to the figure, what type of rocks can include quartz?
a.
granite
b.
basalt
c.
gabbro
d.
peridotite
Hint
6.
An igneous rock with two distinct grain sizes has a __________ texture.
a.
felsic
b.
coarse-grained
c.
porphyritic
d.
fine-grained
Hint
