Plate Tectonics

Front

What type of boundary is the San Andreas fault?

Back

Transform boundary.

Front

Where does subduction take place?

Back

At deep-ocean trenches.

Front

What process adds more crust to the ocean floor?

Back

Sea-floor spreading.

Front

What is the boundary called where two plates collide?

Back

Convergent boundary.

Front

Which processes change the size and shape of the oceans?

Back

Both subduction and sea-floor spreading.

Front

What is a divergent boundary?

Back

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

Front

What is a convergent boundary?

Back

A boundary where two tectonic plates collide.

Front

What is a transform boundary?

Back

A boundary where two tectonic plates slide past each other.

Front

What is sea-floor spreading?

Back

The process by which new oceanic crust is formed at mid-ocean ridges.

Front

What are mid-ocean ridges?

Back

Underwater mountain ranges formed by plate tectonics.