Question 1

Which of these areas of the United States would you expect to have the highest occurance of seismic activity?

Accepted Answer

A)  Southeast
B)  West
C)  Northeast
D)  Central

Question 2

On December 26,2004,a magnitude 9 earthquake generated a tsunami that devastated coastlines on the ____________.

Accepted Answer

A)  Atlantic Ocean
B)  Arctic Ocean
C)  Indian Ocean
D)  Pacific Ocean

Question 3

Aftershocks following a major earthquake ____________.

Accepted Answer

A)  may continue for days after the initial earthquake
B)  are mostly much smaller than the original earthquake
C)  may occur on the same fault as the original earthquake,or a different fault
D)  All of the above are correct.

Question 4

The point on Earth's surface directly above the point where an earthquake occurs is termed the ____________.

Accepted Answer

A)  hypocenter (focus) 
B)  epicenter
C)  eye of the fault
D)  vertex

Question 5

Vertical motion seismographs record earthquakes through the production of a squiggly diagram called a ____________.

Accepted Answer

A)  wave sheet
B)  seismogram
C)  pictogram
D)  camera lucida

Question 6

Sandy substrate is susceptible to ____________ during an earthquake.

Accepted Answer

A)  displacement
B)  collapse
C)  liquifaction
D)  faulting

Question 7

Earthquakes are likely to occur along ____________.

Accepted Answer

A)  convergent-plate boundaries only
B)  divergent-plate boundaries only
C)  transform-plate boundaries only
D)  All of the above are correct. D

Question 8

Which earthquake intensity scale assesses the effects of an earthquake on humans and human-made structures?

Accepted Answer

A)  Richter scale
B)  Mercalli scale
C)  seismic-moment magnitude scale

Question 9

Long-term prediction of earthquake behavior ____________.

Accepted Answer

A)  is based on past earthquake activity
B)  works on the principle that zones of past seismicity will be active in the future
C)  includes the notion of seismic gaps-places where an earthquake is "overdue"
D)  All of the above are correct.

Question 10

The intersection between a fault plane and the ground surface is called the ____________.

Accepted Answer

A)  dip line
B)  plunge
C)  fault trace
D)  seismic interface

Question 11

Movement on a fault may occur without generating earthquakes.

Accepted Answer

A) True 
 B)False  True

Question 12

Which earthquake severity scale measures the amplitude of deflection of a seismograph pen,standardized to an idealized distance of 100 km between epicenter and seismograph?

Accepted Answer

A)  Richter scale
B)  Mercalli scale
C)  seismic-moment magnitude scale

Question 13

A primary force opposing motion on all faults is ____________.

Accepted Answer

A)  magnetic attraction among iron-rich minerals
B)  gravity
C)  friction
D)  Van der Waal's force

Question 14

Which earthquake severity scale varies from locality to locality for a single earthquake?

Accepted Answer

A)  Richter scale
B)  Mercalli scale
C)  seismic-moment magnitude scale

Question 15

According to the moment magnitude scale (Mw) -a magnitude 8 earthquake would be 1,000 times greater than a magnitude ____________ earthquake.

Accepted Answer

A)  9
B)  5
C)  7
D)  4

Question 16

How can damage and injury be minimized in areas prone to seismic activity?

Accepted Answer

A)  earthquake zoning
B)  engineering controls
C)  warning systems
D)  All of the above are correct.

Question 17

Earthquake waves that pass through the interior of Earth are termed ____________.

Accepted Answer

A)  interior waves
B)  R-waves
C)  surface waves
D)  body waves D

Question 18

Medium- and deep-focus earthquakes occur along ____________.

Accepted Answer

A)  convergent-plate boundaries only
B)  divergent-plate boundaries only
C)  transform-plate boundaries only
D)  All of the above are correct.

Question 19

An earthquake occurs with an epicenter in the town of New Madrid,Missouri,in the interior of the North American Plate.Where might the hypocenter of this earthquake plausibly be found?

Accepted Answer

A)  in New Madrid ("hypocenter" and "epicenter" mean precisely the same thing) 
B)  10 km south of New Madrid
C)  20 km beneath New Madrid
D)  200 km beneath New Madrid

Question 20

If,during an earthquake,a footwall slides upward relative to a hanging wall,the fault is termed ____________.

Accepted Answer

A)  normal
B)  reverse
C)  strike slip
D)  thrust

Exam 10: A Violent Pulse: Earthquakes

Which of these areas of the United States would you expect to have the highest occurance of seismic activity?

Correct AnswerverifiedShow Answer

On December 26,2004,a magnitude 9 earthquake generated a tsunami that devastated coastlines on the ____________.

Correct AnswerverifiedShow Answer

Aftershocks following a major earthquake ____________.

Correct AnswerverifiedShow Answer

The point on Earth's surface directly above the point where an earthquake occurs is termed the ____________.

Correct AnswerverifiedShow Answer

Vertical motion seismographs record earthquakes through the production of a squiggly diagram called a ____________.

Correct AnswerverifiedShow Answer

Sandy substrate is susceptible to ____________ during an earthquake.

Correct AnswerverifiedShow Answer

Earthquakes are likely to occur along ____________.

Correct AnswerverifiedD

Which earthquake intensity scale assesses the effects of an earthquake on humans and human-made structures?

Correct AnswerverifiedShow Answer

Long-term prediction of earthquake behavior ____________.

Correct AnswerverifiedShow Answer

The intersection between a fault plane and the ground surface is called the ____________.

Correct AnswerverifiedShow Answer

Movement on a fault may occur without generating earthquakes.

Correct AnswerverifiedTrue

Which earthquake severity scale measures the amplitude of deflection of a seismograph pen,standardized to an idealized distance of 100 km between epicenter and seismograph?

Correct AnswerverifiedShow Answer

A primary force opposing motion on all faults is ____________.

Correct AnswerverifiedShow Answer

Which earthquake severity scale varies from locality to locality for a single earthquake?

Correct AnswerverifiedShow Answer

According to the moment magnitude scale (Mw) -a magnitude 8 earthquake would be 1,000 times greater than a magnitude ____________ earthquake.

Correct AnswerverifiedShow Answer

How can damage and injury be minimized in areas prone to seismic activity?

Correct AnswerverifiedShow Answer

Earthquake waves that pass through the interior of Earth are termed ____________.

Correct AnswerverifiedD

Medium- and deep-focus earthquakes occur along ____________.

Correct AnswerverifiedShow Answer

An earthquake occurs with an epicenter in the town of New Madrid,Missouri,in the interior of the North American Plate.Where might the hypocenter of this earthquake plausibly be found?

Correct AnswerverifiedShow Answer

If,during an earthquake,a footwall slides upward relative to a hanging wall,the fault is termed ____________.

Correct AnswerverifiedShow Answer

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D

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True

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D

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