Volcanoes Answers

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The image shows a volcano erupting at night in Russia.

Question illustration
A
Explosive eruption—beware of ash!
B
Gases push out magma with great force!
C
Volcano quietly erupts due to low-viscosity magma!
D
High silica content of magma results in lava reaching sea level by morning!
2
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Erosion and deposition constantly change Earth’s surface. Erosion carries natural materials like rock and soil from one place to another. Through deposition, these natural materials may be deposited in areas where they build up over time.

A
sill
B
mud pot
C
caldera
D
lava plateau
3

Earth’s surface is constantly changed by erosion and deposition. Erosion breaks down Earth’s surface by carrying materials away from an area. Deposition builds up Earth’s surface when these materials are deposited in an area over time.

A
volcanic soil
B
cinder cone
C
caldera
D
lava plateau
4

The photo shows Old Faithful in Yellowstone National Park.

Question illustration
A
It is a caldera formed from a vent collapsing.
B
It is a mud pot formed from pools of boiling, acidic mud.
C
It is a volcanic neck that formed as a result of magma that never erupted.
D
It is a geyser that formed due to water heated by magma erupting at Earth’s surface.
5

Which word identifies one stage of volcanic activity?

A
dormant
B
explosive
C
underground
D
quiet
6

The image shows Osorno in Chile, which last erupted in 1869.

Question illustration
A
shield volcano
B
active volcano
C
dormant volcano
D
explosive volcano
7

Which phrase describes a volcano that is not expected to erupt again?

A
quiet volcano
B
extinct volcano
C
dormant volcano
D
explosive volcano
8

Which feature is created on the exterior of a volcano when it erupts?

A
magma chamber
B
crater
C
hot spot
D
boundary
9

Which feature forms at a divergent boundary?

A
rift valley
B
island arc
C
subduction zone
D
collision zone
10

Which phrase describes a lava plateau?

A
steep-sided mountain
B
gently sloping mountain
C
hardened magma in a pipe
D
volcanic material in valleys

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