Continental Drift & Plate Tectonics Review

Front

What feature is produced when continents collide at plate boundaries?

Back

Tall mountain ranges.

Front

What does the Theory of Continental Drift state?

Back

All the continents were once one continent that broke up and drifted apart over hundreds of millions of years.

Front

Why did some scientists reject Wegener's Continental Drift Theory?

Back

He couldn't explain how the continents moved.

Front

Where does magma rise to create new crust?

Back

Magma rises where two plates separate and move apart from one another.

Front

What geological evidence suggests that many continents were once near Earth's south pole?

Back

Glacial deposits.

Front

What are tectonic plates?

Back

Large sections of the Earth's lithosphere that move and interact with each other.

Front

What is the process of seafloor spreading?

Back

The formation of new oceanic crust as magma rises at mid-ocean ridges.

Front

What is a rift valley?

Back

A lowland region formed by the divergence of tectonic plates.

Front

What is subduction?

Back

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

Front

What are mid-ocean ridges?

Back

Underwater mountain ranges formed by plate tectonics.