Mi-STAR Volcanoes Lesson 3 Quiz VOCAB

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Eruption

Back

The release of material from a volcano like lava and gases, often explosive.

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Caldera

Back

A large, wide volcanic crater, formed by the collapse of the volcano summit as the result of a major eruption.

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Shield Volcano

Back

A broad volcano with gently sloping sides formed by layers of relatively fluid lava.

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Stratovolcano

Back

A steep-sided, often cone-shaped volcano. Formed by layers of ash, relatively sticky lava and other eruption products.

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Fissure Vent

Back

A linear crack, usually at the bottom of the ocean, through which lava erupts. Usually without any explosive activity. It may consist of a single long vent, or a series of vents oriented along the same linear direction.

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Crystal

Back

A special kind of solid which has a regular shape, often with shiny surfaces.

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Crystallization

Back

The formation of a crystal from a liquid, often during cooling.

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Lava

Back

Molten liquid rock material that comes out of a volcano and forms rocks.

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Molten

Back

A property of a substance meaning liquefied by heat.

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Crust

Back

The thin layer of solid rock that forms the surface of Earth (both over and under oceans).