CKLA Unit 4 Geology: Earth's Fiery Volcanoes

A hill or mountain that forms over a crack in the Earth's crust from which lava erupts is called a:

• fissure

• volcano

• crevice

• magma chamber

When an active volcano hasn't erupted in a long time, it's called:

• an active volcano

• a fine ash volcano

• a subduction volcano

• a dormant volcano

A volcano that hasn't erupted in more than 10,000 years is called:

• an extinct volcano

• an ash cone

• an active volcano

• a subduction zone

Where do volcanos form?

• in cracks and weak spots in the Earth's crust

• along boundaries of tectonic plates that are moving apart

• where two plates are colliding and one is subducting under another

• all of the above

Scientists call areas where several plates are subducting under others:

• magma zones

• lava peaks

• subduction zones

• volcano areas

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The world's largest active volcano is:

• Mauna Loa

• Mount Everest

• Mount Fuji

• Paricutin

The number of active volcanoes that lie around the edges of the Pacific Plate:

• Less than 50

• More than 100

• None

• Over 450

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A very hot region deep within the Earth's mantle where a huge magma chamber forms beneath the Earth's crust is called a:

• island chain

• hotspot

• lava bulge

• volcano

North America's largest hotspot is:

• under Yellowstone National Park

• also called a supervolcano

• so hot it creates hot springs and geysers

• all of the above

Yellowstone's most famous geyser is called:

• Super Soaker

• The Yellowstone Hotspot

• The Yellowstone Geyser

• Old Faithful

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