WorksheetsIgneous Rocks
Total questions: 12
Worksheet time: 16mins
Name
Class
Date
1.
People throughout history have used igneous rock for tools and building materials.
a)
true
b)
false
2.
Which term best describes igneous rocks?
a)
light and easily broken
b)
soft and smooth
c)
hard and dense
d)
soft and dense
3.
Basalt is used for cobblestones and in landscaping.
a)
true
b)
false
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.
Extrusive rock forms beneath Earth's surface.
a)
true
b)
false
6.
Which igneous rock is mixed with soil and used for starting vegetable seeds?
a)
perlite
b)
granite
c)
obsidian
d)
basalt
7.
Magma that is low in silica usually forms light-colored rocks, such as granite.
a)
true
b)
false
8.
Which igneous rock is an extrusive rock?
a)
porphyry
b)
rhyolite
c)
pegmatite
d)
granite
9.
Igneous rocks are classified by their origin, texture, and mineral composition.
a)
true
b)
false
10.
Extrusive rocks have larger grains than intrusive rocks.
a)
true
b)
false
11.
Intrusive rock
a)
igneous rock formed from lava that erupted onto Earth's surface
b)
igneous rock formed when magma hardened beneath the surface of Earth
12.
Extrusive rock
a)
igneous rock formed from lava that erupted onto Earth's surface
b)
igneous rock that formed when magma hardened beneath the surface of Earth
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