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Igneous Rocks
Test Description: Review igneous rock vocabulary
Instructions: Answer all questions to get your test result.
1) Light colored rocks rich in silica and aluminum
A
mafic
B
felsic
C
extrusive
D
intrusive
2) Dark colored rock rich in magnesium and iron
A
extrusive
B
intrusive
C
felsic
D
mafic
3) Molten rock above ground
A
porphory
B
vesicular
C
lava
D
magma
4) Molten rock underground
A
magma
B
lava
C
porphory
D
vesicular
5) Vesicular mean the rock
A
has different size crystals
B
has large crystals
C
is glassy
D
has holes
6) Type of igneous rocks that cool crystallize at or near the Earth's surface
A
mafic
B
extrusive
C
intrusive
D
felsic
7) Intrusive igneous rocks cool ___ have ___ crystals.
A
slowly, large
B
slowly, small
C
quickly, small
D
quickly, large
8) Igneous rocks that cool deep within the Earth's crust
A
extrusive
B
mafic
C
intrusive
D
felsic
9) A rock with VESICULAR texture MUST be
A
felsic
B
intrusive
C
mafic
D
extrusive
10) Obsidian, a rock with a glassy texture, is in the caterogy of ___ igneous rocks
A
vesicular
B
mafic
C
extrusive
D
intrusive
*select an answer for all questions
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