Earth's Layers and Seismic Waves

Front

What are the layers of the Earth?

Back

The Earth is composed of four main layers: the crust, mantle, outer core, and inner core.

Front

Which layer of the Earth is the THICKEST?

Back

The mantle is the thickest layer of the Earth.

Front

What are seismic waves?

Back

Seismic waves are energy radiated in all directions from the focus of an earthquake.

Front

What is the function of a seismograph?

Back

A seismograph records the waves produced by earthquakes.

Front

What is the lithosphere?

Back

The lithosphere includes the crust and the uppermost portion of the mantle, which is solid and rigid.

Front

What is the outer core made of?

Back

The outer core is primarily composed of liquid iron and nickel.

Front

What is the inner core?

Back

The inner core is a solid sphere made mostly of iron and nickel, located at the center of the Earth.

Front

What are body waves?

Back

Body waves are seismic waves that travel through the Earth's interior.

Front

What are surface waves?

Back

Surface waves are seismic waves that travel along the Earth's surface and cause the most damage during an earthquake.

Front

What is the difference between the crust and the mantle?

Back

The crust is the outermost layer of the Earth, while the mantle is the layer beneath the crust, which is much thicker and composed of semi-solid rock.