Plate Tectonics

Front

What are the two types of crust?

Back

Continental and oceanic.

Front

What evidence was NOT used by Wegener as proof of continental drift?

Back

Erosion.

Front

What is the motion of Earth's plates like?

Back

Slow and constant.

Front

_____________ is a plate boundary where two plates move away from each other.

Back

Divergent boundary.

Front

Trenches, deep underwater canyons on the sea floor are created at this type of boundary.

Back

Convergent, Subduction Zone.

Front

What is the theory of Plate Tectonics?

Back

The theory that Earth's outer shell is divided into several plates that glide over the mantle.

Front

What is a convergent boundary?

Back

A plate boundary where two plates move towards each other.

Front

What is a transform boundary?

Back

A plate boundary where two plates slide past each other.

Front

What geological features are formed at divergent boundaries?

Back

Mid-ocean ridges and rift valleys.

Front

What is subduction?

Back

The process where one tectonic plate moves under another and sinks into the mantle.