Plate Tectonics

Front

What is the process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle?

Back

Subduction

Front

What causes the movement of Earth's plates?

Back

Convection currents in the mantle

Front

According to Wegener's theory of continental drift, what happened to the continents?

Back

The continents were once joined together in a single landmass and have slowly moved.

Front

What is a plate boundary where both plates move away from each other called?

Back

Divergent boundary

Front

Where does molten material rise from the mantle and erupt in sea floor spreading?

Back

Along the mid-ocean ridges

Front

What is the theory that explains the movement of continents over geological time?

Back

Continental drift

Front

What type of plate boundary occurs when two plates collide?

Back

Convergent boundary

Front

What geological feature is formed at a divergent boundary?

Back

Mid-ocean ridges

Front

What is the term for the large sections of Earth's lithosphere that move?

Back

Tectonic plates

Front

What is the name of the process where tectonic plates slide past each other?

Back

Transform boundary