Volcanoes

Front

What are volcanoes?

Back

Areas in the earth’s crust which emit lava, ash, and gases.

Front

What is found outside Earth’s crust?

Back

Lava

Front

What is found inside Earth’s crust?

Back

Magma

Front

What does magma erupt as?

Back

Lava or pyroclastic material

Front

What is lava?

Back

Liquid magma that flows from a volcano. Its viscosity may vary.

Front

What is pyroclastic material?

Back

Forms when magma is blasted into the air and cools and hardens.

Front

What is viscosity?

Back

Resistance to flow

Front

What is a pyroclastic flow?

Back

A huge, glowing cloud of hot ash and dust that can race downhill at 200 mph and can be hotter than 700 degrees Celsius.

Front

What are the 3 types of volcanoes?

Back

Composite, Cinder Cone, Shield

Front

What are composite volcanoes?

Back

The most common type, with steep sides, broad base, and very explosive.