Ch 6 Review
Earthquakes
Question 1

a)
b)
c)
d)
The place where slippage first occurs is
called an earthquake’s _______.
Focus
Epicenter
Magnitude
intensity
Question 1
The place where slippage first occurs is
called an earthquake’s _______.
a) Focus

Question 2

a)
b)
c)
d)
The San Andreas Fault zone has formed
where the edge of the Pacific plate is
slipping
Under the North American Plate
Over the North American Plate
South along the North American Plate
North along the North American Plate
Question 2

The San Andreas Fault zone has formed
where the edge of the Pacific plate is
slipping
d) North along the North American Plate
Question 3

a)
b)
c)
d)
The Pacific Ring of Fire is an earthquake
zone that forms a ring around
The Atlantic Ocean
South America
The Pacific Ocean
North America
Question 3

The Pacific Ring of Fire is an earthquake
zone that forms a ring around
c) The Pacific Ocean
Question 4

a)
b)
c)
d)
When friction prevents the rocks on
either side of a fault from moving past
each other, the fault is said to be
fractured
subducting
locked
elastic
Question 4

When friction prevents the rocks on
either side of a fault from moving past
each other, the fault is said to be
c) locked
Question 5

a)
b)
c)
d)
Deep-focus earthquakes usually occur in
areas in which one plate
Slides past another
Remains stationary against another
Moves apart from another
Subducts under another
Question 5

Deep-focus earthquakes usually occur in
areas in which one plate
d) Subducts under another
Question 6

a)
b)
c)
d)
Ninety percent of continental
earthquakes have
The same depth
A shallow focus
The same type of eruptions
A deep focus
Question 6

Ninety percent of continental
earthquakes have
b) A shallow focus
Question 7

a)
b)
c)
d)
How far below the earth’s surface do
intermediate-focus earthquakes occur?
10 to 30 km
30 to 70 km
70 to 300 km
300 to 650 km
Question 7

How far below the earth’s surface do
intermediate-focus earthquakes occur?
c) 70 to 300 km
Question 8

a)
b)
c)
d)
Which type of earthquakes usually occurs
farther inland than other earthquakes?
Deep-focus
Shallow-focus
Intermediate-focus
Microquakes
Question 8
Which type of earthquakes usually occurs
farther inland than other earthquakes?
a) Deep-focus

Question 9

a)
b)
c)
d)
Most earthquakes occur along or near the
edges of the
North American Plate
Earth’s oceans and lakes
Eurasian Plate
Earth’s lithospheric plates
Question 9

Most earthquakes occur along or near the
edges of the
d) Earth’s lithospheric plates
Question 10

a)
b)
c)
d)
Where did the most widely felt series of
earthquakes in the United States occur?
Alaska
California
Hawaii
Missouri
Question 10

Where did the most widely felt series of
earthquakes in the United States occur?
d) Missouri
Question 11

a)
b)
c)
d)
Which type of seismic wave travels the
fastest?
Tsunami
P wave
S wave
Surface wave
Question 11

Which type of seismic wave travels the
fastest?
b) P wave
Question 12

a)
b)
c)
d)
S waves can only travel through
Gases
Solids
Liquids
Gases and liquids
Question 12

S waves can only travel through
b) Solids
Question 13

a)
b)
c)
d)
What is the minimum number of
seismograph stations a scientist must
have data from in order to locate the
epicenter of an earthquake?
1
2
3
4
Question 13

What is the minimum number of
seismograph stations a scientist must
have data from in order to locate the
epicenter of an earthquake?
c) 3
Question 14

a)
b)
c)
d)
A major earthquake has a magnitude of
2.5 to 3.5
3.5 to 6.0
Less than 2.5
7 or above
Question 14

A major earthquake has a magnitude of
d) 7 or above
Question 15

a)
b)
c)
d)
How many separate sensing devices
make up a seismograph?
1
2
3
4
Question 15

How many separate sensing devices
make up a seismograph?
c) 3
Question 16

a)
b)
c)
d)
Which of the following generally causes
the most damage during an earthquake?
Aftershock
Primary wave
Secondary wave
Surface wave
Question 16

Which of the following generally causes
the most damage during an earthquake?
d) Surface wave
Question 17

a)
b)
c)
d)
Tsunamis result from earthquakes with
epicenter located
On the ocean floor
In loose soil
Along coastlines
In continental faults
Question 17
Tsunamis result from earthquakes with
epicenter located
a) On the ocean floor

Question 18

a)
b)
c)
d)
What is a tsunami?
A deep-focused earthquake
A shallow-focus earthquake
A type of seismic wave
A giant ocean wave
Question 18

What is a tsunami?
d) A giant ocean wave
Question 19

a)
b)
c)
d)
Landslides on the seafloor are most likely
to produce
Tsunamis
Fault zones
Seismic gaps
Elastic rebounds
Question 19
Landslides on the seafloor are most likely
to produce
a) Tsunamis

Question 20

a)
b)
c)
d)
A seismic gap is a region in which
There are no seismographs
Tsunamis never occur
A fault is locked
Only deep-focus earthquakes occur
Question 20

A seismic gap is a region in which
c) A fault is locked
Question 21

a)
b)
c)
d)
During an earthquake, a person is most
likely to be safe in
A car
An open field
A cellar
A building
Question 21

During an earthquake, a person is most
likely to be safe in
b) An open field