Earth's Layers and Seismic Waves

Front

What are the three main layers of the Earth?

Back

Crust, Mantle, Core.

Front

What is the outermost layer of the Earth called?

Back

Crust.

Front

What is the layer beneath the Earth's crust?

Back

Mantle.

Front

What is the innermost layer of the Earth?

Back

Inner Core.

Front

What is the state of the outer core?

Back

Liquid.

Front

What is the state of the inner core?

Back

Solid.

Front

What causes tectonic plates to move?

Back

Convection currents in the mantle.

Front

What is a seismograph used for?

Back

To record earthquake waves.

Front

What happens to molten material when it cools in the mantle?

Back

It becomes more dense.

Front

What are seismic waves?

Back

Waves of energy that travel through the Earth.