Question 1

What is the evidence that Seattle is prone to earthquakes since there have been no quakes in historic times?

Accepted Answer

Evidence for a large quake dating from l...

Question 2

Why are most intermediate- to deep-focus earthquakes generated at convergent plate boundaries?

Accepted Answer

The convergent plates generate...

Question 3

Which type(s)of seismic waves do seismographs record?

Accepted Answer

P-waves; S...

Question 4

We know that the mantle is not molten because P-waves can travel through it.

Accepted Answer

A) True 
 B)False

Question 5

The two types of body waves are _______ and _______ waves.

Accepted Answer

A)   Raleigh; Love
B)   compressional; extensional
C)   secondary; primary
D)   tensional; extensionalE) None of the above
F) C) and D)

Question 6

The velocities of P- and S-waves are determined by these two properties of the material they are passing through: ____________________ and ____________________.

Accepted Answer

The answer of The velocities of P- and S-waves are...

Question 7

Why are the paths of seismic waves curved?

Accepted Answer

Density and elastici...

Question 8

The average geothermal gradient near Earth's surface is what?

Accepted Answer

A)   100C/km
B)   50C/km
C)   25C/km
D)   -25C/km
E)   -50C/kmF) A) and C)
G) A) and D)

Question 9

The temperature range at the base of the crust is 1,000 to 1,500 degrees C.

Accepted Answer

A) True 
 B)False

Question 10

The analysis of the alignment of the planets and moon is a scientifically accepted method used to predict earthquakes.

Accepted Answer

A) True 
 B)False

Question 11

The elastic rebound theory of earthquakes postulates that rocks store the energy of ____________________ by bending until their internal strength is surpassed and they ____________________ and return to their former place.

Accepted Answer

deformatio...

Question 12

The theory of elastic rebound was proposed as a result of studies following the ____________________ earthquake in the year ____________________.

Accepted Answer

The answer of The theory of elastic rebound was proposed...

Question 13

According to the elastic rebound theory,____.

Accepted Answer

A)   rocks will bend before they break
B)   rocks will snap back into their original shape after faulting
C)   rocks will break when their capacity to store energy of deformation has been exceeded
D)   rocks will bend before they break AND snap back into their original shape after faulting
E)   all of theseF) A) and B)
G) None of the above

Question 14

Seattle,Washington ____.

Accepted Answer

A)   has not had an earthquake historically
B)   is very unlikely to have a large earthquake because there have been none in historic times
C)   has frequent small earthquakes and so is very unlikely to have a large earthquake
D)   has large earthquakes about once every century
E)   has large earthquakes very infrequently but will likely have one againF) D) and E)
G) A) and D)

Question 15

Scientists use seismic tomography to

Accepted Answer

A)   develop 3-dimensional models of Earth's interior.
B)   determine the location of an earthquake's epicenter.
C)   predict the timing and intensity of a future earthquake.
D)   determine the depth of an earthquake.E) A) and B)
F) A) and C)

Question 16

What is Earth's average density,what are the average surface rock densities,and what does this tell us about the interior of Earth?

Accepted Answer

Earth's average density is 5.5...

Question 17

Only 5 percent of all earthquakes occur within ____.

Accepted Answer

A)   the Mediterranean-Asiatic Belt
B)   the Circum-Mediterranean Belt
C)   the interiors of plates and mid-oceanic ridges
D)   the passive margins of continents and mid-oceanic ridges
E)   the shields of continents and mid-oceanic ridgesF) B) and E)
G) A) and E)

Question 18

Seismic waves that cause a rolling or swaying motion of the surface of the ground are called ____________________.

Accepted Answer

The answer of Seismic waves that cause a rolling or...

Question 19

Monitoring changes in electrical conductivity is a scientifically accepted method used to predict earthquakes.

Accepted Answer

A) True 
 B)False

Question 20

The number of seismograph records needed to locate the epicenter of an earthquake is ______.

Accepted Answer

The answer of The number of seismograph records needed to...

Exam 9: Earthquakes and Earth's Interior

According to the elastic rebound theory,____.

Correct AnswerverifiedShow Answer

What is Earth's average density,what are the average surface rock densities,and what does this tell us about the interior of Earth?

Correct AnswerverifiedEarth's average density is 5.5...View AnswerShow Answer

The elastic rebound theory of earthquakes postulates that rocks store the energy of ____________________ by bending until their internal strength is surpassed and they ____________________ and return to their former place.

Correct Answerverifieddeformatio...View AnswerShow Answer

The temperature range at the base of the crust is 1,000 to 1,500 degrees C.

Correct AnswerverifiedShow Answer

Which type(s)of seismic waves do seismographs record?

Correct AnswerverifiedP-waves; S...View AnswerShow Answer

Seismic waves that cause a rolling or swaying motion of the surface of the ground are called ____________________.

Correct AnswerverifiedShow Answer

Why are most intermediate- to deep-focus earthquakes generated at convergent plate boundaries?

Correct AnswerverifiedThe convergent plates generate...View AnswerShow Answer

Seattle,Washington ____.

Correct AnswerverifiedShow Answer

Only 5 percent of all earthquakes occur within ____.

Correct AnswerverifiedShow Answer

The theory of elastic rebound was proposed as a result of studies following the ____________________ earthquake in the year ____________________.

Correct AnswerverifiedShow Answer

The analysis of the alignment of the planets and moon is a scientifically accepted method used to predict earthquakes.

Correct AnswerverifiedShow Answer

We know that the mantle is not molten because P-waves can travel through it.

Correct AnswerverifiedShow Answer

Monitoring changes in electrical conductivity is a scientifically accepted method used to predict earthquakes.

Correct AnswerverifiedShow Answer

The two types of body waves are _______ and _______ waves.

Correct AnswerverifiedShow Answer

The velocities of P- and S-waves are determined by these two properties of the material they are passing through: ____________________ and ____________________.

Correct AnswerverifiedShow Answer

The average geothermal gradient near Earth's surface is what?

Correct AnswerverifiedShow Answer

Scientists use seismic tomography to

Correct AnswerverifiedShow Answer

What is the evidence that Seattle is prone to earthquakes since there have been no quakes in historic times?

Correct AnswerverifiedEvidence for a large quake dating from l...View AnswerShow Answer

Why are the paths of seismic waves curved?

Correct AnswerverifiedDensity and elastici...View AnswerShow Answer

The number of seismograph records needed to locate the epicenter of an earthquake is ______.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Earth's average density is 5.5...
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The elastic rebound theory of earthquakes postulates that rocks store the energy of by bending until their internal strength is surpassed and they and return to their former place.

Correct Answer
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deformatio...
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Correct Answer
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Correct Answer
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P-waves; S...
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Correct Answer
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Correct Answer
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The convergent plates generate...
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Correct Answer
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Correct Answer
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The theory of elastic rebound was proposed as a result of studies following the earthquake in the year .

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The two types of body waves are _ and _ waves.

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The velocities of P- and S-waves are determined by these two properties of the material they are passing through: and .

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Correct Answer
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Correct Answer
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Correct Answer
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Evidence for a large quake dating from l...
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Density and elastici...
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Correct Answer
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