Igneous Rocks Question Preview (ID: 51447)


Review Igneous Rock Vocabulary. TEACHERS: click here for quick copy question ID numbers.

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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