Volcanoes

Front

What is magma?

Back

molten rock under the ground

Front

Melting point range of most rock?

Back

800°C to 1200°C

Front

Magma that is made up of Basalt with a low (50%) silica content.

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Basaltic

Front

Viscosity

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internal resistance to flow

Front

The temperature and composition of the magma determines the viscosity of magma.

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True

Front

This volcano is a mountain with broad gently sloping sides and a nearly circular base.

Back

shield

Front

The Hawaiian Islands - Kilauea is an example of a

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Shield volcano

Front

These volcanoes are steep sided and generally small (less than 500 meters high). They are formed when material ejected high into the air falls back to Earth and piles up around the vent.

Back

Cinder cone

Front

An example of this type of volcano is Paricutin in Mexico. Options: cinder cone, strato or composite, shield.

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cinder cone

Front

These are larger than other volcanoes and their slopes are not as steep. They are formed when layers of volcanic fragments alternate with lava flows.

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composite or strato