Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

Why are the paths of seismic waves curved?

Accepted Answer

The answer of Why are the paths of seismic waves...

Question 4

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 5

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 ridges

Question 6

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.

Question 7

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 8

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 9

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/km

Question 10

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 these

Question 11

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 again

Question 12

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

Accepted Answer

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

Question 13

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

The answer of What is Earth's average density,what are the...

Question 14

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

Accepted Answer

The answer of What is the evidence that Seattle is...

Question 15

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

Accepted Answer

The answer of Why are most intermediate- to deep-focus earthquakes...

Question 16

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

Accepted Answer

A)  Raleigh; Love 
B)  compressional; extensional 
C)  secondary; primary 
D)  tensional; extensional

Question 17

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

The answer of The elastic rebound theory of earthquakes postulates...

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 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

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

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

Why are the paths of seismic waves curved?

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

Only 5 percent of all earthquakes occur within ____.

Scientists use seismic tomography to

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

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

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

According to the elastic rebound theory,____.

Seattle,Washington ____.

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

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

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

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

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

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.

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

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

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