Volcanoes Answers

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Which phrase describes a lava plateau?

steep-sided mountain

gently sloping mountain

hardened magma in a pipe

volcanic material in valleys

The image shows a volcano erupting at night in Russia.

Explosive eruption—beware of ash!

Gases push out magma with great force!

Volcano quietly erupts due to low-viscosity magma!

High silica content of magma results in lava reaching sea level by morning!

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

magma chamber

crater

hot spot

boundary

Mount St. Helens is a volcano that erupted with great force in 1980. Which phrase best describes this eruption?

quiet eruption

gentle lava flows

magma low in silica

high-viscosity magma

The photo shows Old Faithful in Yellowstone National Park.

It is a caldera formed from a vent collapsing.

It is a mud pot formed from pools of boiling, acidic mud.

It is a volcanic neck that formed as a result of magma that never erupted.

It is a geyser that formed due to water heated by magma erupting at Earth’s surface.

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