Chapter 11 Earthquakes

Stress is a(n) __________that acts on rock to change its shape or volume

• quake

• force

• motion

Which type of stress force produces reverse faults?

• shearing

• tension

• compression

Which of the following can cause damage days or months after a large earthquake?

• foreshocks

• aftershocks

• primary shocks

• secondary shocks

 The Ring of Fire is an area of seismic activity around the Atlantic Ocean.

• true

• false

The highest risk and the greater number of of earthquakes in the United States occur along the west coast.

• true

• false

The first waves shown on a seismogram are the P waves.

• true

• false

 On a seismogram, higher lines drawn in the paper indicate weaker seismic waves.

• true

• false

In a seismograph, seismic waves cause the pen to move back and forth, which produces a pattern of zig-zag lines

• true

• false

The Modified Mercalli scale rates the amount of ___________ from an earthquake.

• damage

• shaking

• cause

____________ can become surface waves when they reach Earth’s surface.

• p-waves

• s-waves

• both p-waves and s-waves

• neither p-waves and s-waves