Front

What is a convergent boundary?

Back

A convergent boundary is where two tectonic plates move towards each other, often resulting in the formation of mountains or subduction zones.

Front

What landform is typically created at a convergent boundary between two continental crusts?

Back

Mountains are typically formed at convergent boundaries between two continental crusts.

Front

What did Harry Hess discover about the age of the Atlantic Ocean floor?

Back

The Atlantic Ocean floor is progressively older the further it moves away from the mid-ocean ridge.

Front

What is an oceanic-oceanic divergent boundary?

Back

An oceanic-oceanic divergent boundary is where two oceanic plates move apart, leading to the creation of new oceanic crust.

Front

What happens at a transform boundary?

Back

At a transform boundary, two tectonic plates slide past each other horizontally, which can cause earthquakes.

Front

What is subduction?

Back

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

Front

What is the mid-ocean ridge?

Back

The mid-ocean ridge is an underwater mountain range formed by plate tectonics, where new oceanic crust is created.

Front

What is the significance of Harry Hess's theory of seafloor spreading?

Back

Harry Hess's theory of seafloor spreading explains how new oceanic crust is formed at mid-ocean ridges and recycled at subduction zones.

Front

What is a volcanic island arc?

Back

A volcanic island arc is a chain of volcanic islands formed at a convergent boundary between an oceanic plate and a continental plate.

Front

What is the difference between continental crust and oceanic crust?

Back

Continental crust is thicker and less dense than oceanic crust, which is thinner and denser.