pd 4 LAB FLASHCARD What can you tell from studying seismic waves?

Front

How do seismologists gather information about the Earth's interior?

Back

By studying seismic waves generated by earthquakes.

Front

What do S-waves do when they meet the outer core?

Back

They stop.

Front

Why do we know there are two layers to the Earth’s core?

Back

S Waves stop at the outer core, P Waves bend as they reach the inner core.

Front

What happens to the speed of waves as the density of the material increases?

Back

Waves get faster.

Front

What does the Earth's magnetic field protect us from?

Back

Solar radiation.

Front

What are seismic waves?

Back

Waves of energy that travel through the Earth, often as a result of an earthquake.

Front

What are P-waves?

Back

Primary waves that are compressional and can travel through solids and liquids.

Front

What are S-waves?

Back

Secondary waves that are shear waves and can only travel through solids.

Front

What is the outer core made of?

Back

Liquid iron and nickel.

Front

What is the inner core made of?

Back

Solid iron and nickel.