Earth's Layers

Front

What are the three main layers of Earth?

Back

The three main layers of Earth are the core, the mantle, and the crust.

Front

What property do scientists use to divide Earth into layers?

Back

Scientists divide Earth into layers based on physical properties.

Front

What is the innermost layer of Earth called?

Back

The innermost layer of Earth is called the core.

Front

What layer do tectonic plates move on?

Back

Tectonic plates move on the asthenosphere.

Front

How do geologists obtain direct evidence of Earth’s interior?

Back

Geologists obtain direct evidence by collecting drill core samples of Earth’s crust.

Front

What is the outermost layer of Earth?

Back

The outermost layer of Earth is called the crust.

Front

What is the mantle?

Back

The mantle is the layer of Earth between the crust and the core, composed of semi-solid rock.

Front

What is the asthenosphere?

Back

The asthenosphere is a soft layer of the mantle on which tectonic plates move.

Front

What is the difference between the lithosphere and the asthenosphere?

Back

The lithosphere is the rigid outer layer of Earth, while the asthenosphere is the softer, more ductile layer beneath it.

Front

What is the core primarily made of?

Back

The core is primarily made of iron and nickel.