9.5 Checkpoint #1

Front

What is the stress force that pulls on the crust and thins rock in the middle?

Back

Tension

Front

What is the pattern of zigzag lines that records an earthquake's seismic waves?

Back

Seismogram

Front

What scale rates the amount of shaking from an earthquake?

Back

Modified Mercalli Scale

Front

What instrument is used to detect and record seismic waves?

Back

Seismograph

Front

What is the scale that measures the magnitude of an earthquake?

Back

Richter Scale

Front

What type of seismic wave travels the fastest?

Back

P wave

Front

What type of seismic wave causes the most damage during an earthquake?

Back

Surface wave

Front

What is the term for the point on the Earth's surface directly above the focus of an earthquake?

Back

Epicenter

Front

What is the focus of an earthquake?

Back

The point within the Earth where the earthquake originates.

Front

What is the difference between the Richter Scale and the Modified Mercalli Scale?

Back

The Richter Scale measures magnitude, while the Modified Mercalli Scale measures intensity.