Earthquake Practice

Front

What are the fastest body waves?

Back

P-waves

Front

At what location does the first motion of an earthquake occur?

Back

The focus

Front

How do scientists find the epicenter of an earthquake?

Back

By comparing the arrival times of P waves and S waves at several seismograph stations.

Front

What is the epicenter of an earthquake?

Back

The point on Earth's surface directly above the earthquake's focus.

Front

When seismologists record the arrival times of P waves and S waves at several seismograph stations, they are looking for the earthquake's

Back

epicenter

Front

What is the minimum number of seismograph stations needed to locate an earthquake's epicenter?

Back

3

Front

What can a single seismograph station determine by itself?

Back

The distance to the epicenter from the seismograph station.

Front

The release of energy by an ____________ causes Earth's crust to shake.

Back

earthquake

Front

Seismographs detect and record _______ waves.

Back

seismic

Front

Primary waves are ____________ waves, meaning they cause material to compress and expand.

Back

compression