Volcanoes Answers

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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
2
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Which phrase describes a volcano that is not expected to erupt again?

A
quiet volcano
B
extinct volcano
C
dormant volcano
D
explosive volcano
3

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!
4

Which event causes a volcanic eruption?

A
magma turning into lava
B
water being heated by magma
C
explosions occurring in magma chambers
D
magma cutting through older rocks
5

Which phrase describes a sill?

A
fills in valleys and rivers
B
is a hardened magma intrusion
C
cuts vertically through older rock layers
D
is built up by numerous eruptions over thousands of years
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

A volcano that has not erupted in a very long time suddenly has a plume of steam coming from it. Which best describes this volcano?

A
was dormant and is now active
B
was quiet and is now active
C
was extinct and is now explosive
D
was dormant and is now explosive
8

Which word identifies one stage of volcanic activity?

A
dormant
B
explosive
C
underground
D
quiet
9

Heat from magma deep beneath the Earth's surface warms underground water, which then rises due to temperature differences. This heated water emerges naturally, creating geothermal features.

A
dike
B
hot spring
C
lava plateau
D
mud pot
10

The image shows the locations of volcanoes around the world.

Question illustration
A
Many volcanoes are on the eastern coast of Asia.
B
Most volcanoes are in the center of continents.
C
No volcanoes are found in the middle of the ocean.
D
Many volcanoes are on the eastern coasts of North and South America.

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