A_23 Inside Earth Reading Questions

Front

What does the S-wave shadow zone indicate about the Earth's interior?

Back

It indicates the presence of a liquid outer core.

Front

What is the radius of Earth in kilometers?

Back

6,371 kilometers.

Front

What type of motion do P-waves exhibit?

Back

Forward-and-backward motion.

Front

What is the main characteristic of P-waves?

Back

They move with a forward-and-backward motion.

Front

What is the average speed of S-waves after an earthquake?

Back

3 kilometers per second.

Front

What are seismic waves?

Back

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

Front

What is the difference between P-waves and S-waves?

Back

P-waves are compressional waves that move through solids and liquids, while S-waves are shear waves that only move through solids.

Front

What is the outer core of the Earth primarily composed of?

Back

Liquid iron and nickel.

Front

How do scientists study the Earth's interior?

Back

By analyzing seismic waves generated by earthquakes.

Front

What is the significance of the Earth's mantle?

Back

It is the layer between the crust and the outer core, composed of semi-solid rock that flows slowly.