Earth Science

Front

What causes Earth's tectonic plates to move?

Back

Convection currents in the mantle.

Front

What is a convergent boundary?

Back

A type of plate boundary where two plates come together.

Front

What was the name of the ancient supercontinent formed 28 million years ago?

Back

Pangea.

Front

How is new crust formed without increasing Earth's surface area?

Back

Crust is destroyed at the same time it is created.

Front

What happens at a divergent boundary?

Back

Plates pull apart.

Front

What is the Earth's outer layer called?

Back

The crust.

Front

What is the mantle?

Back

The layer of the Earth between the crust and the core, composed of semi-solid rock.

Front

What is subduction?

Back

The process where one tectonic plate moves under another plate and sinks into the mantle.

Front

What is a transform boundary?

Back

A type of plate boundary where two plates slide past each other.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, including the crust and upper mantle.