Why do some volcanoes explode?

Front

What volcano erupted in Washington in 1980, its first eruption in over 100 years?

Back

Mount St. Helens

Front

Which describes a shield volcano?

Back

A type of volcano that is wide but not tall.

Front

A cone volcano is: Short and flat, Wide and round with a smooth surface, Narrow and twisted with a jagged edge, Tall and steep with a cone shape

Back

Tall and steep with a cone shape

Front

The rocks of the cone volcano, the kind that explodes, are all pale or light colored. They are called:

Back

felsite

Front

What type of lava forms in a shield volcano?

Back

thin lava

Front

After it explodes, a volcano can build itself back up again.

Back

true

Front

Shield volcanoes have a thin, runny lava that cools into a dark-colored rock called:

Back

Basalt

Front

What creates the bubbles in lava?

Back

Gases

Front

Why do some volcanoes explode?

Back

Pressure from trapped gases and magma

Front

Which type of lava explodes?

Back

thick lava