Plate Tectonics Review

Front

What type of boundary is the San Andreas Fault?

Back

Transform boundary.

Front

How are the ocean crusts moving during sea-floor spreading?

Back

Diverging.

Front

Why does oceanic crust subduct under continental crust?

Back

Because oceanic crust is dense.

Front

What causes the movement of tectonic plates?

Back

Convection currents in the Asthenosphere.

Front

What happens when the denser oceanic crust subducts under the less dense continental crust?

Back

Volcanic activity may occur.

Front

What is a converging boundary?

Back

A boundary where two tectonic plates move towards each other.

Front

What is a diverging boundary?

Back

A boundary where two tectonic plates move away from each other.

Front

What is a transform boundary?

Back

A boundary where two tectonic plates slide past each other.

Front

What is subduction?

Back

The process where one tectonic plate moves under another plate.

Front

What is the Asthenosphere?

Back

A semi-fluid layer of the Earth's mantle that allows tectonic plates to move.