Earthquake Flashcards

Front

What is an earthquake?

Back

The shaking and trembling that results from the sudden movement of the Earth’s crust. Faulting is the main cause of earthquakes.

Front

How many earthquakes occur per year?

Back

1,000,000 per year! Most earthquakes are too small to feel.

Front

Why does California have more earthquakes?

Back

Because it's on 2 plates moving different ways.

Front

What is a tsunami?

Back

A giant wave caused by an earthquake that occurs on the ocean floor.

Front

Where is the safest place to be during a tsunami?

Back

In the middle of the ocean on a boat.

Front

What are seismic waves?

Back

Waves caused by earthquakes.

Front

What are the 3 types of seismic waves?

Back

P Waves (primary waves), S Waves (secondary waves), and L Waves (surface waves).

Front

What are P Waves?

Back

Primary waves that travel through solids, liquids, and gases.

Front

What are S Waves?

Back

Secondary waves that travel through solids but get absorbed by gases and liquids.

Front

What are L Waves?

Back

Surface waves (land waves) that are the slowest and most destructive.