Igneous Rocks Question Preview (ID: 51447)
Review Igneous Rock Vocabulary.
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Light colored rocks rich in silica and aluminum
a) felsic
b) mafic
c) extrusive
d) intrusive
Dark colored rock rich in magnesium and iron
a) felsic
b) mafic
c) extrusive
d) intrusive
Molten rock above ground
a) lava
b) magma
c) porphory
d) vesicular
Molten rock underground
a) lava
b) porphory
c) vesicular
d) magma
Vesicular mean the rock
a) is glassy
b) has large crystals
c) has different size crystals
d) has holes
Type of igneous rocks that cool crystallize at or near the Earth's surface
a) extrusive
b) intrusive
c) felsic
d) mafic
Intrusive igneous rocks cool ___ have ___ crystals.
a) slowly, large
b) quickly, large
c) slowly, small
d) quickly, small
Igneous rocks that cool deep within the Earth's crust
a) felsic
b) extrusive
c) intrusive
d) mafic
A rock with VESICULAR texture MUST be
a) extrusive
b) intrusive
c) felsic
d) mafic
Obsidian, a rock with a glassy texture, is in the caterogy of ___ igneous rocks
a) extrusive
b) intrusive
c) mafic
d) vesicular
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