Question 1

If the P-S time intervals are known from at least three seismograph stations, the ____ of any earthquake can be determined.

Accepted Answer

A) focal depth 
B) intensity 
C) magnitude 
D) probability of a tsunami 
E) epicenter 
A) focal depth 
B) intensity 
C) magnitude 
D) probability of a tsunami 
E) epicenter

Question 2

The geothermal gradient is not useful for estimating temperatures at great depth.

Accepted Answer

A) True 
 B)False

Question 3

In January 2010 and March 2011, two major earthquakes occurred in ____ and ____.

Accepted Answer

A) Haiti; Japan 
B) Indonesia; Japan 
C) Mexico; Haiti 
D) Japan; Mexico 
E) Indonesia; Mexico 
A) Haiti; Japan 
B) Indonesia; Japan 
C) Mexico; Haiti 
D) Japan; Mexico 
E) Indonesia; Mexico

Question 4

Cold rocks have greater elasticity than do hot rocks.

Accepted Answer

A) True 
 B)False

Question 5

How do geologists define an earthquake?

Accepted Answer

An earthquake is the shaking o

Question 6

Many things can be done to improve the safety of current structures and of new buildings. List three (3)with a brief explanation.

Accepted Answer

To design earthquake-resistant structure

Question 7

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 8

According to elastic rebound theory, rocks deform and bend. When their internal strength is exceeded they rupture. This energy release is called an earthquake.

Accepted Answer

A) True 
 B)False

Question 9

A very strong earthquake recorded in North America was the intraplate quake known as the ____ earthquake.

Accepted Answer

A) 1811 New Madrid 
B) 1886 Boston 
C) 1906 San Francisco 
D) 1964 Anchorage 
E) 1984 Mount St. Helens 
A) 1811 New Madrid 
B) 1886 Boston 
C) 1906 San Francisco 
D) 1964 Anchorage 
E) 1984 Mount St. Helens

Question 10

The lithosphere is made up of the ____.

Accepted Answer

A) the crust and upper mantle 
B) the crust and outer core 
C) the crust and the inner core 
D) upper mantle and outer core 
E) upper mantle and inner core 
A) the crust and upper mantle 
B) the crust and outer core 
C) the crust and the inner core 
D) upper mantle and outer core 
E) upper mantle and inner core

Question 11

P-waves travel faster than S-waves ____.

Accepted Answer

A) under all circumstances 
B) only when the earthquake is generated in Earth's core 
C) when the ground surface is dense and elastic 
D) when both waves pass through liquid 
E) only when Earth's density increases with depth 
A) under all circumstances 
B) only when the earthquake is generated in Earth's core 
C) when the ground surface is dense and elastic 
D) when both waves pass through liquid 
E) only when Earth's density increases with depth

Question 12

Scientists use seismic tomography to ____.

Accepted Answer

A) develop a three-dimensional model 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) decrease the intensity of an impending earthquake 
A) develop a three-dimensional model 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) decrease the intensity of an impending earthquake

Question 13

Almost ____ % of earthquakes take place along plate boundaries.

Accepted Answer

A) 100 
B) 95 
C) 80 
D) 55 
E) 25 
A) 100 
B) 95 
C) 80 
D) 55 
E) 25

Question 14

Monitoring changes in the electrical resistance of the ground is a scientifically accepted method used to predict earthquakes.

Accepted Answer

A) True 
 B)False

Question 15

Most earthquakes occur along the circum-Pacific belt primarily because ____.

Accepted Answer

A) of the convergence along plate margins 
B) of the divergence along plate margins 
C) Earth's crust is more rigid in these areas 
D) P- and S-waves are stronger in those areas due to the greater density of Earth's crust 
E) S-waves travel easily through water 
A) of the convergence along plate margins 
B) of the divergence along plate margins 
C) Earth's crust is more rigid in these areas 
D) P- and S-waves are stronger in those areas due to the greater density of Earth's crust 
E) S-waves travel easily through water

Question 16

Below the outermost layer of Earth lies the ____, which accounts for more than ____ of Earth's volume.

Accepted Answer

A) core; 30% 
B) core; 50% 
C) core; 80% 
D) mantle; 50% 
E) mantle; 80% 
A) core; 30% 
B) core; 50% 
C) core; 80% 
D) mantle; 50% 
E) mantle; 80%

Question 17

The Seattle, Washington area ____.

Accepted Answer

A) is very likely to have a large earthquake in the foreseeable future 
B) is very unlikely to ever have a large earthquake 
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 never had a large earthquake 
A) is very likely to have a large earthquake in the foreseeable future 
B) is very unlikely to ever have a large earthquake 
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 never had a large earthquake

Question 18

A very small percentage of all earthquakes occur ____.

Accepted Answer

A) along the Mediterranean-Asiatic Belt 
B) along the Circum-Mediterranean Belt 
C) within the interiors of plates and spreading-ridge systems 
D) along the west coast of South America 
E) along the east coast of East Asia in the Pacific Ocean 
A) along the Mediterranean-Asiatic Belt 
B) along the Circum-Mediterranean Belt 
C) within the interiors of plates and spreading-ridge systems 
D) along the west coast of South America 
E) along the east coast of East Asia in the Pacific Ocean

Question 19

As S- and P-waves travel farther, ____.

Accepted Answer

A) their intensity increases 
B) the surface waves catch up 
C) they overtake the surface waves 
D) the P-S time interval increases 
E) the P-S time interval decreases 
A) their intensity increases 
B) the surface waves catch up 
C) they overtake the surface waves 
D) the P-S time interval increases 
E) the P-S time interval decreases

Question 20

The composition of the mantle is primarily ____.

Accepted Answer

A) peridotite 
B) basalt 
C) granite 
D) iron 
E) gabbro 
A) peridotite 
B) basalt 
C) granite 
D) iron 
E) gabbro

Exam 9: Earthquakes and Earthapos;s Interior

If the P-S time intervals are known from at least three seismograph stations, the ____ of any earthquake can be determined.

The geothermal gradient is not useful for estimating temperatures at great depth.

In January 2010 and March 2011, two major earthquakes occurred in ____ and ____.

Cold rocks have greater elasticity than do hot rocks.

How do geologists define an earthquake?

Many things can be done to improve the safety of current structures and of new buildings. List three (3)with a brief explanation.

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

According to elastic rebound theory, rocks deform and bend. When their internal strength is exceeded they rupture. This energy release is called an earthquake.

A very strong earthquake recorded in North America was the intraplate quake known as the ____ earthquake.

The lithosphere is made up of the ____.

P-waves travel faster than S-waves ____.

Scientists use seismic tomography to ____.

Almost ____ % of earthquakes take place along plate boundaries.

Monitoring changes in the electrical resistance of the ground is a scientifically accepted method used to predict earthquakes.

Most earthquakes occur along the circum-Pacific belt primarily because ____.

Below the outermost layer of Earth lies the ____, which accounts for more than ____ of Earth's volume.

The Seattle, Washington area ____.

A very small percentage of all earthquakes occur ____.

As S- and P-waves travel farther, ____.

The composition of the mantle is primarily ____.

Understanding Earth: a Dynamic and Evolving Planet

Plate Tectonics: a Unifying Theory

Minerals: The Building Blocks of Rocks

Igneous Rocks and Plutons

Volcanoes and Volcanism

Weathering, Erosion, and Soil

Sediment and Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Deformation, Mountain Building, and Earthapos;s Crust

Mass Wasting

Running Water--Streams and Rivers

Groundwater

Glaciers and Glaciation

The Work of Wind and Deserts

Oceans, Shorelines, and Shoreline Processes

Geologic Time: Concepts and Principles

Organic Evolution--The Theory and Its Supporting Evidence

Precambrian Earth and Life History

Paleozoic Earth History

Paleozoic Life History

Mesozoic Earth and Life History

Cenozoic Earth and Life History

Filters

In January 2010 and March 2011, two major earthquakes occurred in and .

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

Below the outermost layer of Earth lies the , which accounts for more than of Earth's volume.