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