The Continental Drift Theory & Plate Tectonics

Front

What is the densest type of crust?

Back

Oceanic crust is the densest type of crust.

Front

What is a break in the Earth's crust along which rocks move called?

Back

A fault is a break in the Earth's crust along which rocks move.

Front

What occurs when a continental plate collides with an oceanic plate and the oceanic plate sinks underneath?

Back

Subduction occurs when a continental plate collides with an oceanic plate and the oceanic plate sinks underneath.

Front

What type of plate boundary is characterized by plates sliding past each other?

Back

Transform plate boundary is characterized by plates sliding past each other.

Front

What type of plate boundary occurs when two plates collide?

Back

Convergent plate boundary occurs when two plates collide.

Front

What is the process called when new oceanic crust is formed at mid-ocean ridges?

Back

Sea-floor spreading is the process when new oceanic crust is formed at mid-ocean ridges.

Front

What is the term for the movement of tectonic plates?

Back

Plate tectonics is the term for the movement of tectonic plates.

Front

What is the outermost layer of the Earth called?

Back

The outermost layer of the Earth is called the crust.

Front

What is the layer of the Earth beneath the crust?

Back

The layer of the Earth beneath the crust is called the mantle.

Front

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

Back

The Continental Drift Theory explains the movement of continents over geological time.