Front

What explains that the continents were once joined together and over time they broke up and then drifted apart?

Back

Continental Drift

Front

Which type of crust is more dense and thinner?

Back

Oceanic

Front

What type of boundary creates trenches, deep underwater canyons on the sea floor?

Back

Convergent, Subduction Zone

Front

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

Back

Divergent boundary

Front

What is the name of the boundary where two plates collide?

Back

Convergent boundary

Front

What is the theory that explains the movement of Earth's plates?

Back

Plate Tectonic Theory

Front

What is the layer of the Earth that is made up of the crust and the upper mantle?

Back

Lithosphere

Front

What type of boundary occurs when two plates slide past each other?

Back

Transform boundary

Front

What geological feature is formed at a divergent boundary?

Back

Mid-ocean ridges

Front

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

Back

Subduction