Plate Tectonics

Front

What is the layer of Earth that flows slowly and causes the crust to move?

Back

Mantle

Front

What causes the movement of Earth's tectonic plates?

Back

Convection currents.

Front

What is the process called when one tectonic plate slides under another?

Back

Subduction.

Front

What is the layer of Earth that is divided into pieces called tectonic plates?

Back

Lithosphere.

Front

What are Mid-Ocean Ridges?

Back

A chain of underwater mountains.

Front

What is the outermost layer of the Earth called?

Back

Crust.

Front

What is the term for the boundary where two tectonic plates meet?

Back

Plate boundary.

Front

What type of plate boundary occurs when two plates move apart?

Back

Divergent boundary.

Front

What type of plate boundary occurs when two plates collide?

Back

Convergent boundary.

Front

What is the name of the process where new oceanic crust is formed?

Back

Seafloor spreading.