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Rocks and Minerals
Task Cards
(Igneous Rocks)
A rock is made of:
_________ rocks form when
molten rock cools and solidifies.
a. Magma
a. Igneous
b. Crystals
b. Metamorphic
c. Metal
c. Sedimentary
d. One or more minerals
d. Metallic
1
What type of rock is formed
when lava cools?
2
Igneous rocks are made from:
a. Igneous
b. Metamorphic
c. Sedimentary
d. Clastic
a.
Weathering and deposition
b.
Heat and pressure
c.
Hot and cold weather
d.
Magma deep inside the Earth
and lava on the Earth’s surface
3
4
___________ are the building
blocks of rocks.
Minerals must be:
a. Naturally occurring
a. Minerals
b. Solid
b. Soil
c. Inorganic
d. Fixed composition
c. Crystals
e. An element or a compound
d. Metal
f.
5
Minerals can be identified by:
All of the above
6
True/False: The two types of luster
are shiny and non-shiny.
a. Color
b. Streak
c. Luster
d. Hardness
e. All of the above
7
8
The Moh’s scale can be used to
test a mineral’s:
Minerals can be identified by
their density. The formula for
density is:
a. Color
a. Mass x volume
b. Streak
b. Mass / volume
c. Hardness
c. Volume / mass
d. Luster
d. Weight x volume
9
_________ is the tendency of a
mineral to break along flat
surfaces.
10
___________ is the tendency of
a mineral to break into irregular
pieces.
a. Fracture
b. Cleavage
a.
b.
c.
d.
Fracture
Cleavage
Streak
Luster
c. Streak
d. Luster
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12
True/False: Igneous rocks can be
classified by where they were
formed and their mineral
composition.
True/False: Molten rock is called
magma when it is beneath
Earth’s surface and lava when it
is above Earth’s surface.
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14
Igneous rocks that are
formed below Earth’s surface
are called
Intrusive igneous rocks
a. Intrusive
b. Cool slowly
b. Extrusive
c. Have large crystals
c. Clastic
d. All of the above
a. Are formed from magma
d. Metallic
15
16
True/False: Granite is an
example of an intrusive igneous
rock.
Igneous rocks that are formed
above Earth’s surface when
lava cools are called
a.
b.
c.
d.
Intrusive
Extrusive
Clastic
Metallic
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17
The more slowly molten rock
cools, the _____________ the
igneous rock crystals will be.
Which of the following is not an
example of an intrusive igneous
rock?
a.
b.
c.
d.
a.
b.
c.
d.
Larger
Smaller
More colorful
More dense
19
Granite
Gabbro
Diorite
Basalt
20
Intrusive igneous rocks are also
called:
Extrusive igneous rocks
a. Plutonic rocks
a.
b.
c.
d.
b. Volcanic rocks
Are formed from lava
Cool quickly
Have small crystals
All of the above
c. Gaseous rocks
d. Glassy
21
Which of the following is an
example of an extrusive igneous
rock?
22
True/False: Glassy igneous rocks
cool slowly and form large
crystals.
a. Obsidian
b. Granite
c. Conglomerate
d. Sandstone
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24
An igneous rock can form from:
a.
b.
c.
d.
Basaltic magma
Granitic magma
Andesitic magma
All of the above
Which of the following is not an
example of an extrusive igneous
rock?
a. Gabbro
b. Basalt
c. Andesite
d. Rhyolite
25
True/False: Volcanic glass rocks
cool so quickly that few or no
mineral grains form.
26
Extrusive igneous rocks are also
called:
a. Plutonic rocks
b. Volcanic rocks
c. Gaseous rocks
d. Crystals
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Basaltic igneous rocks are
True/False: Basalt is the most
common rock type found in
Earth’s crust.
a. light-colored and dense
b. dark-colored and less dense
c. light-colored and less dense
d. dark-colored and dense
29
Granitic igneous rocks are
a.
b.
c.
d.
light-colored and dense
dark-colored and less dense
light-colored and less dense
dark-colored and dense
31
30
True/False; Andesitic igneous
rocks are usually gray in color
and have a medium density.
32
Which of the following rock types
is shown in the picture below?
Which of the following rock types
is shown in the picture below?
a.
b.
c.
d.
a.
b.
c.
d.
Granite
Obsidian
Pumice
Basalt
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Granite
Obsidian
Pumice
Basalt
34
Which of the following rock types
is shown in the picture below?
Which of the following rock
types is commonly used as an
abrasive in skin exfoliating?
a. Granite
b. Obsidian
c. Pumice
d. Basalt
35
a.
b.
c.
d.
Granite
Obsidian
Pumice
Basalt
36