Earth Science Flashcard #1

Front

Why did no one believe Wegener's theory?

Back

He could not explain HOW the continents moved.

Front

What is a giant landmass that existed 200 million years ago?

Back

Pangaea.

Front

What does Letter D represent in Earth's layers?

Back

Inner Core.

Front

What is the process by which new ocean crust forms?

Back

Seafloor spreading.

Front

What do most geologists think causes the movement of Earth's tectonic plates?

Back

Convection currents.

Front

What is the Earth's outermost layer called?

Back

Crust.

Front

What is the layer of the Earth located between the crust and the core?

Back

Mantle.

Front

What is the term for the movement of the Earth's plates?

Back

Plate tectonics.

Front

What is the name of the boundary where two tectonic plates meet?

Back

Plate boundary.

Front

What is subduction?

Back

The process where one tectonic plate moves under another.