Volcanoes and Plate Tectonics

Front

What are volcanoes?

Back

Openings in the crust that release energy from deep inside the planet.

Front

What are submarine volcanoes?

Back

Volcanoes that erupt below the earth's surface.

Front

Where do 75% of the world's active volcanoes occur?

Back

In the Ring of Fire.

Front

Who developed the theory of continental drift?

Back

Alfred Wegener.

Front

What is Pangea?

Back

The super continent.

Front

What is the process by which continents broke apart?

Back

Continental drift.

Front

What is the lithosphere?

Back

The layer of the earth that is made up of earth's crust.

Front

What is the upper mantle of the earth broken into?

Back

Tectonic plates.

Front

How much do plates move per year?

Back

10 cm and 4 inches.

Front

What are the two types of tectonic plates?

Back

Oceanic and continental.