Earth's Layers and Geological Evidence

Front

What are the three main layers of the Earth?

Back

Crust, Mantle, Core.

Front

What is the Earth's thinnest layer?

Back

Crust.

Front

What is convection?

Back

The transfer of heat through the movement of fluids (liquids and gases).

Front

What happens to convection currents if the Earth's inside cools down?

Back

Convection currents would slow down.

Front

What type of heat transfer occurs in the mantle?

Back

Convection.

Front

What is direct evidence in geology?

Back

Evidence obtained from rock samples.

Front

What is indirect evidence in geology?

Back

Evidence obtained from seismic (earthquake) waves.

Front

What are seismic waves?

Back

Waves of energy that travel through the Earth, often caused by earthquakes.

Front

What is the mantle?

Back

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

Front

What is the core of the Earth?

Back

The innermost layer of the Earth, consisting of a solid inner core and a liquid outer core.