Plate Tectonics - Continental Drift

Front

What is the primary cause of the movement of Earth's tectonic plates?

Back

Convection in the mantle.

Front

What type of boundary occurs when tectonic plates move away from each other?

Back

Divergent boundary.

Front

What geological feature is commonly formed at a convergent boundary between two continental plates?

Back

Mountains.

Front

What evidence do glacier scars in Africa provide about its past climate?

Back

Africa was once in an area of the Earth that had a very cold climate.

Front

What was the name of the supercontinent that existed around 250 million years ago?

Back

Pangea.

Front

What is continental drift?

Back

The theory that continents have moved over geological time and were once joined together.

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 and is forced into the mantle.

Front

What geological activity is commonly associated with divergent boundaries?

Back

Volcanic activity and the formation of new oceanic crust.

Front

What is the significance of the mid-ocean ridge?

Back

It is a divergent boundary where new oceanic crust is formed.