Unit 3 Flashcardizz Mid-Term Review

Front

What is the source of energy that drives plate movement?

Back

Convection currents in the asthenosphere.

Front

How do scientists determine what Earth’s interior looks like?

Back

By using seismic waves.

Front

What is the bottom layer of soil mostly made of?

Back

Solid rock.

Front

What are large pieces of lithosphere that move around on the asthenosphere called?

Back

Tectonic plates.

Front

Which layer of the Earth is the most dense?

Back

Inner core.

Front

What is the asthenosphere?

Back

A semi-fluid layer of the mantle that allows tectonic plates to move.

Front

What are seismic waves?

Back

Waves of energy that travel through the Earth, used to study its interior.

Front

What is the lithosphere?

Back

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

Front

What is continental drift?

Back

The theory that continents have moved over geological time and were once joined together.

Front

What is the difference between oceanic and continental crust?

Back

Oceanic crust is denser and thinner than continental crust.