1
Q
Igneous Rocks
A
cooling or hardening of lava or magma
2
Q
Extrusive
A
formed outside
3
Q
Intrusive
A
formed inside
4
Q
Texture
A
size, shape, order of mineral crystals
5
Q
Felsic
A
light color rocks
thick
high silica
low density
6
Q
Mafic
A
dark color rocks
thin
low in silica
high density
7
Q
Porous
A
to have many holes
8
Q
Coarse
A
rough
9
Q
Fine
A
small smooth crystals
10
Q
Obsidian
A
ONLY exception to the color rule
high in silica
11
Q
Intermediate rocks
A
like both felsic and malfic rocks
12
Q
Intrusive Rocks
A
Underground Large Course Slow speed Magma
13
Q
Magma
A
Magma below the earth
14
Q
Lava
A
Magma above the earth
15
Q
Glassy/Glassy & Porous
A
Above no crystals glassy/porous very fast speed Lava
16
Q
Extrusive
A
Above Invisable/small Fine Fast speed Lava
Rocks 101
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