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What is an active volcano?
A volcano that has erupted recently and is likely to do so again.
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What is the crust?
The outer layer of the Earth.
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What is a dormant volcano?
A volcano that has erupted within the last 2000 years but not recently.
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What are earthquakes?
A movement or tremor in the Earth's crust.
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What is an extinct volcano?
A volcano that has not erupted in the last 2000 years and is unlikely to do so again.
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What is lava?
Molten rock flowing from under the Earth's crust.
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What is magma?
Molten rock below the Earth's surface.
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What is magma chamber?
Where molten rock is found deep below the Earth's surface.
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What is mantle?
The layor of the earth between the crust and the core.
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What is a natural hazard?
A great force of nature, such as an earthquake, flood, or volcano that is a danger to people.
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What is a plate boundary?
Where two plates meet.
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Whats a plate?
Large section of the Earth's crust.
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What is the ring of fire?
A circle of volcanoes around the edge of the Pacific Ocean.
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What is a richter scale?
A scale used to meausure the strengh of earthquakes.
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What is seismograph?
The instrument used to measure the strengh of an earthquake.
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What is the vent?
An opnening in Earth's surface through which material is forced during a volcanic eruption.
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What are volcanic bombs?
Large rock fragments thrown out by erupting volcano.
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What is a volcano?
A cone shaped mountain made from lava and or ash.
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What are zones of activity?
Areas where earthquakes and volcanos are common.
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Other cards in this set

Card 2

Front

What is the crust?

Back

The outer layer of the Earth.

Card 3

Front

What is a dormant volcano?

Back

Preview of the front of card 3

Card 4

Front

What are earthquakes?

Back

Preview of the front of card 4

Card 5

Front

What is an extinct volcano?

Back

Preview of the front of card 5
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