Ch. 9 Lesson 1 Flashcard Review

Front

Where do earthquakes occur most frequently?

Back

In the oceans.

Front

What is the name for a break in Earth's lithosphere where two blocks of rock slide horizontally past each other in opposite directions?

Back

Strike-slip fault.

Front

Where do most earthquakes occur?

Back

In the oceans.

Front

Which one is NOT a type of seismic wave?

Back

Ground waves.

Front

What is the method seismologists use to determine an earthquake's epicenter?

Back

Triangulation.

Front

What are seismic waves?

Back

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

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and upper mantle.

Front

What is a fault?

Back

A fracture or zone of fractures between two blocks of rock.

Front

What are primary waves?

Back

The fastest type of seismic wave that compresses and expands the material they move through.

Front

What are secondary waves?

Back

Seismic waves that move the ground up and down or side to side, slower than primary waves.