Front

What is a volcano?

Back

A landform created from layers of cooled and solidified lava that have erupted from the vent.

Front

How does pyroclastic material differ from lava?

Back

Pyroclastic material is associated with explosive eruptions, unlike lava.

Front

What triggers the small earthquakes that occur around a volcano before an eruption?

Back

The upward movement of magma.

Front

Where do volcanoes come from?

Back

Volcanoes can form in places where tectonic plates move apart, where they are moving together, or at hot spots.

Front

What type of eruption typically produces a pyroclastic flow?

Back

An explosive eruption.

Front

Define pyroclastic flow.

Back

A fast-moving current of hot gas and volcanic matter that flows down the slopes of a volcano during an explosive eruption.

Front

What is magma?

Back

Magma is molten rock located beneath the Earth's surface.

Front

What is the difference between magma and lava?

Back

Magma is found underground, while lava is magma that has erupted onto the Earth's surface.

Front

What are the main types of volcanoes?

Back

The main types of volcanoes are shield volcanoes, stratovolcanoes, and cinder cone volcanoes.

Front

What is a shield volcano?

Back

A broad, gently sloping volcano formed by the eruption of low-viscosity lava.