11.4 Notes Flashcards

1
Q

Igneous rocks are formed from

A

hot molten rock

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2
Q

ignis in latin means

A

fire

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3
Q

rocks that forms when magma hardens beneath Earth’s surface

A

intrusive igneous rock

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4
Q

the slower the magma cools the

A

larger the crystals

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5
Q

when lava hardens on the Earth’s surface

A

extrusive igneous rocks

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6
Q

common extrusive rock properties

A

smaller crystals, vesicular texture (air holes), no crystals at all (glassy)

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7
Q

slow cooling results in the formation of ____ crystals

A

large

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8
Q

coarse grained rocks

A

intrusive rocks

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9
Q

rapid cooling of magma or lava results in rocks with what type of crystals

A

small, mineral crystals

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10
Q

fine grained rocks

A

extrusive rocks

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11
Q

results from cooling that is so fast that minerals do not have a chance to crystallize

A

glassy texture

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12
Q

is glassy texture intrusive or extrusive

A

extrusive

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13
Q

rock example with glassy texture

A

obsidian

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14
Q

result of gas bubbles, which often occurs during volcanic eruptions

A

vesicular texture

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15
Q

is vesicular texture on intrusive or extrusive rock

A

extrusive rocks

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16
Q

what are vesicles

A

holes, pores, or cavities

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17
Q

example of a rock with vesicular texture

A

pumice

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18
Q

felsic has darker or lighter color

A

lighter color

19
Q

felsic has a higher or lower density

A

lower density

20
Q

what is felsic rock rich in

A

Silicon and Aluminum

21
Q

mafic rocks has a lighter or darker color

A

darker color

22
Q

mafic rocks have a higher or lower density

A

higher density

23
Q

mafic rocks are rich in

A

iron and magnesium

24
Q

how is basalt formed

A

extrusion (volcanic)

25
what is the texture of basalt
fine
26
what is the color of basalt
darker
27
composition of basalt
iron and magnesium
28
how is granite formed
intrusion (plutonic)
29
texture of granite
coarse
30
color of granite
lighter color
31
composition of granite
silicon and aluminum
32
You know it is an igneous rock if it has
gas pockets, if it's glassy, or has large coarse crystals
33
how do igneous rocks form
from the solidification of molten material (lava or magma)
34
igneous rocks exhibit
intergrown or interlocking mineral crystals
35
if an igneous rock cools fast what forms
small crystals
36
if an igneous rock cools slowly
large crystals form
37
mafic rocks are what color and what density
dark colored and high density
38
felsic rocks are what color and what density
light colored and low density
39
if an igneous rock cools extremely fast,
the rock will have a glassy texture like obsidian
40
vesicular texture
gas pockets like pumice or scoria
41
intrusive
formed below ground
42
extrusive
formed above ground
43
If I see what then it's an igneous rock
crystals, if it's glassy, or has air pockets