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Igneous Rocks
Test Description: This is a practice quiz on Igneous Rocks.
Instructions: Answer all questions to get your test result.
1) Igneous rocks that formed from lava that erupted onto Earth's surface is called
A
intrusive rock
B
clastic rock
C
extrusive rock
D
sedimentary rock
2) The most abundant intrusive rock in the continental crust is
A
quartzite
B
granite
C
flint
D
slate
3) Why do intrusive rocks have a rough texture?
A
Intrusive rocks contain lots of silica.
B
Intrusive rocks form from magma.
C
Intrusive rocks form quickly.
D
Intrusive rocks have big crystals.
4) The most abundant extrusive rock on the oceanic crust is
A
basalt
B
slate
C
granite
D
flint
5) An igneous rock that is formed from lava is called a(n) _________ rock.
A
foliated rock
B
coarse grained rock
C
extrusive rock
D
intrusive rock
6) An igneous rock that is formed when magma hardens below Earth's surface is called
A
extrusive rock
B
foliated rock
C
intrusive rock
D
fine grained rock
7) ________________ is a material that formed from oxygen and silicon.
A
Coquina
B
Coal
C
Basalt
D
Silica
8) If an igneous rock is light colored, it probably contains a lot of ____________.
A
magnesium
B
aluminum
C
silica
D
calcium
9) A(n) _______________ rock forms from the cooling of magma or lava.
A
Foliated
B
Metamorphic
C
Igneous
D
Sedimentary
10) The texture of obsidian is __________.
A
fine grained
B
foliated
C
coarse grained
D
glassy
*select an answer for all questions
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