Question 1

P wave S wave surface wave body wave

Accepted Answer

The answer of P wave S wave surface wave body...

Question 2

Felt earthquakes usually last for ________.

Accepted Answer

A) less than 1 second (they are instantaneous) 
B) 1 to 10 seconds 
C) 10 to 60 seconds 
D) 1 to 10 minutes 
A) less than 1 second (they are instantaneous) 
B) 1 to 10 seconds 
C) 10 to 60 seconds 
D) 1 to 10 minutes

Question 3

The earth's major layers formed because ________.

Accepted Answer

A) the chemical composition of the solar nebula changed over time 
B) the earth was heated after its formation resulting in melting and redistribution of major chemical compositions 
C) radioactive decay caused materials to change over time and resulted in the layering 
D) the earth's mantle grew like a crystal forming around the earth's core but the crust was exposed to space and stayed more like the original material 
A) the chemical composition of the solar nebula changed over time 
B) the earth was heated after its formation resulting in melting and redistribution of major chemical compositions 
C) radioactive decay caused materials to change over time and resulted in the layering 
D) the earth's mantle grew like a crystal forming around the earth's core but the crust was exposed to space and stayed more like the original material

Question 4

The ocean ridge systems that make up the major divergent plate boundaries are a source of frequent large earthquakes and tsunamis.

Accepted Answer

A) True 
 B)False

Question 5

Megathrusts between subducting oceanic crust and an overriding plate are a potential source of tsunamis because ________.

Accepted Answer

A) the earthquakes on these faults are underwater and could displace large amounts of water from the oceans 
B) the earthquakes on these faults are underwater and could release large amounts of water from the asthenosphere 
C) one side of the fault is on land and the other is underwater so an earthquake could cause a landslide or tsunami depending on which side moved 
D) oceanic crust is "thrust" over the continent along a megathrust so that forces the land downward producing a tsunami 
A) the earthquakes on these faults are underwater and could displace large amounts of water from the oceans 
B) the earthquakes on these faults are underwater and could release large amounts of water from the asthenosphere 
C) one side of the fault is on land and the other is underwater so an earthquake could cause a landslide or tsunami depending on which side moved 
D) oceanic crust is "thrust" over the continent along a megathrust so that forces the land downward producing a tsunami

Question 6

The figure below shows the intensity of an Earthquake in northern California that affected much of the same areas that were damaged by the 1906 earthquake in a very similar manner.Based on this information,________.

Accepted Answer

A) people should not be allowed to build homes in the intensity VIII regions because the U.S.taxpayer has to pay to rebuild after such an earthquake 
B) people who live in the high intensity regions should be required to carry earthquake insurance 
C) construction methods are clearly inadequate in the high intensity areas,and all homes in those areas need to be reinforced 
D) in general,the current building codes are adequate,but people should be aware of the hazards in this area 
A) people should not be allowed to build homes in the intensity VIII regions because the U.S.taxpayer has to pay to rebuild after such an earthquake 
B) people who live in the high intensity regions should be required to carry earthquake insurance 
C) construction methods are clearly inadequate in the high intensity areas,and all homes in those areas need to be reinforced 
D) in general,the current building codes are adequate,but people should be aware of the hazards in this area

Question 7

________ has an average density of 2.7 g/cc.

Accepted Answer

The answer of ________ has an average density of 2.7...

Question 8

Approximately how much more energy is released in a 6.5 Richter magnitude earthquake than in one with a Richter magnitude of 5.5?

Accepted Answer

A) 900 times 
B) 10 times 
C) 100 times 
D) 30 times 
A) 900 times 
B) 10 times 
C) 100 times 
D) 30 times

Question 9

S waves can travel through solid and liquid media.

Accepted Answer

A) True 
 B)False

Question 10

Earthquake prediction is ________.

Accepted Answer

A) not possible 
B) possible for short times before some earthquakes based on things like animal behavior,but the U.S.does not make use of this method. 
C) somewhat good for very long term statistical analyses based on ideas like mapping seismic gaps 
D) generally good if you live in an area along a plate boundary because we know how fast the plates are moving and can measure the stress accumulation 
A) not possible 
B) possible for short times before some earthquakes based on things like animal behavior,but the U.S.does not make use of this method. 
C) somewhat good for very long term statistical analyses based on ideas like mapping seismic gaps 
D) generally good if you live in an area along a plate boundary because we know how fast the plates are moving and can measure the stress accumulation

Question 11

Aftershocks occur because ________.

Accepted Answer

A) seismic energy continues to build up for a period of time after a major earthquake 
B) the day after a large earthquake there are tidal forces that continue to create additional earthquakes 
C) the area surrounding a region that experienced a large earthquake needs time to adjust to the displacements on the main fault 
D) there are always small earthquakes on major faults,but we do not notice them until there is a large event that makes us aware of them 
A) seismic energy continues to build up for a period of time after a major earthquake 
B) the day after a large earthquake there are tidal forces that continue to create additional earthquakes 
C) the area surrounding a region that experienced a large earthquake needs time to adjust to the displacements on the main fault 
D) there are always small earthquakes on major faults,but we do not notice them until there is a large event that makes us aware of them

Question 12

________ makes up the largest part of the volume of the earth.

Accepted Answer

The answer of ________ makes up the largest part of...

Question 13

Should scientists be encouraged to make short term earthquake predictions even though the current methods for such predictions are very unreliable?

Accepted Answer

Maybe… If we had a regular earthquake re

Question 14

If you are on a beach,you might recognize that a tsunami is approaching because ________.

Accepted Answer

A) waves will gradually get higher and higher as the tsunami approaches 
B) waves will gradually get closer together and approach the beach faster than normal 
C) the water will withdraw from the beach farther than usual 
D) the water will run up on the beach farther than usual 
A) waves will gradually get higher and higher as the tsunami approaches 
B) waves will gradually get closer together and approach the beach faster than normal 
C) the water will withdraw from the beach farther than usual 
D) the water will run up on the beach farther than usual

Question 15

Faults are "locked" because ________.

Accepted Answer

A) earthquakes only form when the rocks are free to move 
B) high confining pressure increases friction on the fault 
C) otherwise they would have earthquakes all the time 
D) elastic rebound occurs on faults 
E) major faults occur at plate boundaries that only move occasionally 
A) earthquakes only form when the rocks are free to move 
B) high confining pressure increases friction on the fault 
C) otherwise they would have earthquakes all the time 
D) elastic rebound occurs on faults 
E) major faults occur at plate boundaries that only move occasionally

Question 16

In the open ocean,Tsunamis travel at about the same speed as a commercial airliner.

Accepted Answer

A) True 
 B)False

Question 17

We are fortunate in the United States that large tsunamis do not affect most of our coastal regions except in Hawaii.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is determined by measuring the amplitude of waves recorded from an earthquake?

Accepted Answer

A) epicenter 
B) focus or hypocenter 
C) magnitude 
D) intensity 
A) epicenter 
B) focus or hypocenter 
C) magnitude 
D) intensity

Question 19

The Richter magnitude of an earthquake is determined from the ________.

Accepted Answer

A) duration of the earthquake 
B) intensity of the earthquake 
C) arrival time of P and S waves 
D) amplitude of the largest seismic wave 
A) duration of the earthquake 
B) intensity of the earthquake 
C) arrival time of P and S waves 
D) amplitude of the largest seismic wave

Question 20

Strike-slip faults are common along ________ plate boundaries.

Accepted Answer

The answer of Strike-slip faults are common along ________ plate...

Exam 8: Earthquakes and Earths Interior

P wave S wave surface wave body wave

Felt earthquakes usually last for ________.

The earth's major layers formed because ________.

The ocean ridge systems that make up the major divergent plate boundaries are a source of frequent large earthquakes and tsunamis.

Megathrusts between subducting oceanic crust and an overriding plate are a potential source of tsunamis because ________.

The figure below shows the intensity of an Earthquake in northern California that affected much of the same areas that were damaged by the 1906 earthquake in a very similar manner.Based on this information,________.

________ has an average density of 2.7 g/cc.

Approximately how much more energy is released in a 6.5 Richter magnitude earthquake than in one with a Richter magnitude of 5.5?

S waves can travel through solid and liquid media.

Earthquake prediction is ________.

Aftershocks occur because ________.

________ makes up the largest part of the volume of the earth.

Should scientists be encouraged to make short term earthquake predictions even though the current methods for such predictions are very unreliable?

If you are on a beach,you might recognize that a tsunami is approaching because ________.

Faults are "locked" because ________.

In the open ocean,Tsunamis travel at about the same speed as a commercial airliner.

We are fortunate in the United States that large tsunamis do not affect most of our coastal regions except in Hawaii.

Which of the following is determined by measuring the amplitude of waves recorded from an earthquake?

The Richter magnitude of an earthquake is determined from the ________.

Strike-slip faults are common along ________ plate boundaries.

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

Weathering, soil, and Mass Wasting

Running Water and Groundwater

Glaciers, deserts, and Wind

Plate Tectonics: a Scientific Revolution Unfolds

Volcanoes and Other Igneous Activity

Crustal Deformation and Mountain Building

Geologic Time

Earths Evolution Through Geologic Time

The Ocean Floor

Ocean Water and Ocean Life

The Dynamic Ocean

The Atmosphere: Composition,structure,and Temperature

Moisture, clouds, and Precipitation

Air Pressure and Wind

Weather Patterns and Severe Weather

World Climates and Global Climate Change

Origin of Modern Astronomy

Touring Our Solar System

Light,astronomical Observations,and the Sun

Beyond Our Solar System

Filters