WorksheetsIgneous Rocks
Total questions: 35
Worksheet time: 35mins
Name
Class
Date
1.
Which would have larger crystals, intrusive or extrusive igneous rocks
a)
intrusive
b)
extrusive
2.
Magma forms on the surface or under the surface?
a)
on the surface
b)
under the surface
3.
_____ is an igneous rock made up of the minerals quartz, mica, feldspar.
a)
granite
b)
basalt
c)
scoria
d)
gneiss
4.
How do coarse-grained igneous rocks form?
a)
from sedimentary rocks changed under pressure
b)
from large rock particles cemented together
c)
from rapidly cooling lava
d)
from slowly cooling magma
5.
Which igneous rock is an extrusive rock?
a)
porphyry
b)
rhyolite
c)
pegmatite
d)
granite
6.
Slow cooling magma far beneath Earth's surface results in _____ texture.
a)
coarse-grained
b)
fine-grained
c)
glassy
7.
Rapid cooling of lava in which no crystals form results in _____ texture
a)
coarse-grained
b)
porphyritic
c)
glassy
8.
Fast cooling of lava in which small crystals form results in _____ texture.
a)
coarse-grained
b)
fine-grained
c)
porphyritic
9.
Lava that is low in silica and high in iron usually forms _____ colored rocks.
a)
dark
b)
light
10.
Lava that is high in silica usually forms _____ colored rocks.
a)
dark
b)
light
11.
One common use for the igneous rock granite is...
a)
building material
b)
cutting tools
c)
abrasion in polishing
d)
cement
12.
A slow cooling igneous rock will have _____ crystals
a)
large
b)
small
c)
average
d)
black
13.
The process by which igneous rocks are formed...
a)
heat and pressure deep underneath earth's surface
b)
melting and cooling of magma
c)
compaction and cementation of sediments
14.
This rock cools so quickly that crystals have no time to form.
a)
Basalt
b)
Obsidian
c)
Gabbro
d)
Pumice
15.
This rock cooled on the outside of a volcano and contained air bubbles when it was forming. What type of texture is this?
a)
glassy
b)
vesicular
c)
coarse
d)
porphyritic
16.
Is lava above or below ground
a)
below
b)
above
17.
This rock was molten magma that slowly cooled under the ground. What texture will it have?
a)
glassy
b)
fine
c)
prophyritic
d)
coarse
18.
Which igneous rock is made out of just pyroxene and olivine?
a)
Gabbro
b)
Peridotite
c)
Andesite
d)
Pegmatite
19.
Magma is found...
a)
Inside Earth
b)
On Surface of Earth
20.
If an Igneous rock is light in color, it is?
a)
Granitic
b)
Basaltic
c)
Intermediate
21.
If an Igneous rock is darkly colored, it is called?
a)
Granitic
b)
Basaltic
c)
Intermediate
22.
A pegmatitic texture in an igneous rock means what?
a)
Looks like glass
b)
Very large crystals
c)
Tiny/No crystals
23.
If an igneous rock forms with lots of space and over a long period of time, what will the rock have?
a)
no mineral crystals
b)
smaller crystals
c)
both small and large crystals
d)
larger crystals
24.
Not all minerals crystallize at the same time. What is this called?
a)
fractional crystallization
b)
partial melting
c)
porphyritic
d)
total crystallization
25.
According to the Bowen's reaction series, which mineral crystallizes at the hottest temperature?
a)
Olivine
b)
Pyroxene
c)
Sodium Feldpar
d)
Quartz
26.
According to the Bowen's Reaction Series, which mineral crystallize at the coolest temperature?
a)
Olivine
b)
Pyroxene
c)
Sodium Feldar
d)
Quartz
27.
What is the name of a Basaltic, extrusive igneous rock?
a)
Granite
b)
Rhyolite
c)
Gabbro
d)
Basalt
28.
What is the name of a basaltic, intrusive igneous rock?
a)
Granite
b)
Rhyolite
c)
Gabbro
d)
Basalt
29.
What category of igneous rock has two different sizes of crystals?
a)
glassy
b)
extrusive
c)
intrusive
d)
porphyritic
30.
What is the name of a granitic, intrusive igneous rock?
a)
Granite
b)
Rhyolite
c)
Gabbro
d)
Basalt
31.
What is the name of a granitic, extrusive igneous rock?
a)
Granite
b)
Rhyolite
c)
Gabbro
d)
Basalt
32.
What is the name of a granitic, extrusive igneous rock that is vesicular (bubbles)?
a)
Porphyry
b)
Obsidian
c)
Andesite
d)
Pumice
33.
Which Igneous rock is underneath the continents?
a)
Granite
b)
Basalt
c)
Pumice
d)
Obsidian
34.
Which Igneous rock is found on the ocean floor?
a)
Pumice
b)
Basalt
c)
Granite
d)
Obsidian
35.
What is the name of a basaltic, extrusive igneous rock?
a)
Granite
b)
Basalt
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