unit 7 quiz

A _______ is a fracture in rock along which rock masses move relative to one another parallel to the fracture.

• landslide

• focus

• seismogram

• fault

What causes an earthquake?

• the sudden release of slowly accumulated strain/ stress on rocks

• the pull of the moon and sun on earth's crust

• the swelling of earth's mantle

• the expansion of earth's core

What is it called when faults slip because they connot bear the forces applied to them?

• elastic rebound

• energetic rebound

• plastic rebound

• shear rebound

Which of the following effects is NOT caused by friction in faults?

• faults become "locked-up"

• faults stop moving for extended periods

• faults become lubricated and slip

• faults continue to build up stress

Which type of seismic waves travels through the earth as a longitudinal or compressional wave?

• Primary waves

• Secondary waves

• Surface waves

• all

Which type of seismic wave causes the most ground movement and therefore, the most damage?

• Primary waves

• Secondary waves

• Surface waves

How are rock particles moved as a primary wave passes through them? 

• up and down against the wave direction

• side to side adjacent to the wave direction

• back and forth in the direction of wave motion

• varies upon density

If you were woken up by the arrival of P waves from an earthquake, which of the following would most likely to TRUE?

• you slept through the S waves

• the next set of tremors will be stronger

• the next set of tremors will be weaker

• the next set of tremors will take 5 minutes to arrive

What technique uses seismic waves to build images of the Earth's interior?

• gravity anomalies

• seismic evolution

• seismic anomalies

• seismic tomography

What do we believe causes the S wave shadow zone?

• the lower mantle

• the liquid outer core

• the solid inner core

• the asthenosphere