Volcanoes Answers

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The photo shows Old Faithful in Yellowstone National Park.

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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.
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Which word identifies one stage of volcanic activity?

A
dormant
B
explosive
C
underground
D
quiet
3

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
4

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

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