Plate Tectonics

Front

What is Pangaea?

Back

The name of the super-continent that existed millions of years ago.

Front

What are the two types of crust?

Back

Continental and oceanic.

Front

How are the ocean crusts moving in sea-floor spreading?

Back

Diverging.

Front

What is the thickest layer of the Earth?

Back

Mantle.

Front

What geological theory states that pieces of Earth’s lithosphere are in constant, slow motion?

Back

Plate tectonics.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and upper mantle.

Front

What is the asthenosphere?

Back

The semi-fluid layer beneath the lithosphere that allows tectonic plates to move.

Front

What is subduction?

Back

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

Front

What are tectonic plates?

Back

Large pieces of the Earth's lithosphere that move and interact at their boundaries.

Front

What is sea-floor spreading?

Back

The process by which new oceanic crust is formed at mid-ocean ridges and older crust is pushed away.