Volcanoes

Front

What do volcanoes that form over hot spots indicate?

Back

They indicate the rate and direction of motion of tectonic plates.

Front

What is magma?

Back

Magma is molten rock under the ground.

Front

What type of volcanic eruptions occur at divergent boundaries?

Back

Rift zone eruptions.

Front

What is the melting point range of most rock?

Back

800°C to 1200°C.

Front

What is viscosity?

Back

Viscosity is the internal resistance to flow.

Front

What is a volcano?

Back

A volcano is an opening in the Earth's crust where molten rock, ash, and gases can escape.

Front

What are the two main types of volcanic eruptions?

Back

Explosive eruptions and effusive eruptions.

Front

What is the difference between magma and lava?

Back

Magma is molten rock beneath the Earth's surface; lava is magma that has reached the surface.

Front

What is a hotspot?

Back

A hotspot is a location where magma from deep within the mantle melts through the crust above it.

Front

What are tectonic plates?

Back

Tectonic plates are large sections of the Earth's lithosphere that move and interact with each other.