Igneous Rocks — Test Answers

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1
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What is magma?

A
solid rock with a fine texture
B
cooled rock with large crystals
C
molten rock below Earth’s surface
D
flowing rock above Earth’s surface
2
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Which sedimentary rock is burned to produce energy?

A
coal
B
iron ore
C
rock salt
D
limestone
3

Which characteristic is used to classify metamorphic rocks as foliated or non-foliated?

A
grain size
B
layer thickness
C
arrangement of layers
D
arrangement of grains
4

The image shows rock layers and magma under Earth's surface.

Question illustration
A
1
B
2
C
3
D
4
5

Which type of metamorphic rock has randomly arranged grains and does not split into layers?

A
foliated
B
banded
C
massive
D
non-foliated
6

Which is one source from which metamorphic rocks form?

A
soil particles
B
igneous rock
C
molten material
D
sand particles
7

Which is one of the main categories of sedimentary rocks?

A
clastic
B
limestone
C
shale
D
sandstone
8

Which is one source of the sediments that form sedimentary rocks?

A
chunks of coal
B
particles in new rocks
C
liquid magma
D
materials dissolved in solutions
9

Which two processes are destructive forces that occur during sedimentary rock formation?

A
cementation and compaction
B
compaction and deposition
C
deposition and weathering
D
weathering and erosion
10

Where are extrusive igneous rocks typically found?

A
in a canyon
B
in a riverbed
C
near a dormant volcano
D
deep under Earth’s surface
11

Which characteristic is one of the three main characteristics used to classify igneous rocks?

A
hardness
B
shape
C
size
D
texture
12

A rock is found in an area that once had an active volcano and has since been affected by erosion. The rock has individual black and white crystals that are easy to see.Which other description fits the rock?

A
fine texture
B
cooled quickly
C
exposed to air and water
D
cooled inside the volcano

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Igneous Rocks — Test Answers — WCA 4130 Earth…