Question 1

The destructive power of a tsunami is due mostly to the great height of the wave.

Accepted Answer

A) True 
 B)False

Question 2

The tsunami that devastated the south coast of Newfoundland in 1929 was caused by a ______________.

Accepted Answer

A)   vertical rupture of the seafloor in an earthquake
B)   submarine landslide caused by an earthquake
C)   meteor impact
D)   volcanic flank collapse in the Canary IslandsE) A) and B)
F) B) and C)

Question 3

It is virtually impossible for ships in the open ocean to survive a passing tsunami.

Accepted Answer

A) True 
 B)False

Question 4

The 1975 tsunami at Kitimat,BC was generated by _______.

Accepted Answer

A)   a flank collapse of a fjord volcano
B)   an earthquake at the subduction zone at the mouth of the fjord
C)   construction work in the local area triggering underwater slope failure
D)   massive rock fall from the cliff face
E)   the eruption of an underwater volcanoF) A) and E)
G) A) and B)

Question 5

Buoys are used to trigger tsunami warnings because the large wave passing under them lifts them much higher than wind generated waves,signaling a tsunami wave.

Accepted Answer

A) True 
 B)False

Question 6

The Pacific Tsunami Warning Center (PTWC) declares a "tsunami watch" when an earthquake meeting three criteria is identified.Which of the following characteristics is not one not needed for a watch to be issued?

Accepted Answer

A)   Richter magnitude of 7.0 or greater
B)   Reports of shaking for more than one-minute
C)   Epicenter on ocean floor
D)   Hypocentre shallower than 100 kilometresE) B) and D)
F) B) and C)

Question 7

Prior to the 2004 event,the last major tsunami in the Indian Ocean struck in 1883 and killed about 36,000 people.This tsunami was caused by ___________________.

Accepted Answer

A)   a massive undersea landslide near Sri Lanka
B)   the collapse of Indonesia's Krakatau volcano
C)   a large earthquake off the coast of Sumatra
D)   a large earthquake off the coast of India
E)   a meteor that struck in the central Indian OceanF) A) and E)
G) B) and C)

Question 8

When wind caused waves approach the shoreline,friction causes them to slow and their wavelengths ________ resulting in waves _________.

Accepted Answer

A)   decrease;growing taller
B)   decrease;growing wider
C)   increase;growing smaller
D)   increase;growing tallerE) A) and B)
F) None of the above

Question 9

The great 1964 Alaska earthquake (M 9.2) set off a tsunami that killed 122 people along the state's sparsely populated coastline.This tsunami also killed 12 of the curious people in ___________.

Accepted Answer

A)   Hawaii
B)   Vancouver
C)   Chili
D)   California
E)   JapanF) A) and B)
G) B) and D)

Question 10

Tsunamis typically have _________________________ relative to wind-blown waves.

Accepted Answer

A)   short periods and short wavelengths
B)   short periods and long wavelengths
C)   long periods and short wavelengths
D)   long periods and long wavelengths
E)   long periods and no measurable wavelengthF) All of the above
G) A) and D)

Question 11

Tsunami generated from a megathrust earthquake on the Cascadia Subduction Zone could devastate the cities of Vancouver and Victoria.

Accepted Answer

A) True 
 B)False

Question 12

While California has experienced many deadly earthquakes,it has never experienced fatalities from tsunami.

Accepted Answer

A) True 
 B)False

Question 13

The 2004 Indian Ocean tsunami killed an estimated 245,000 people in ____ countries.

Accepted Answer

A)   5
B)   8
C)   13
D)   50
E)   60F) A) and B)
G) None of the above

Question 14

A tsunami source was revealed by the mapping of the ocean bottom around the Hawaiian Islands.What did geologists discover on the seafloor in this area?

Accepted Answer

A)   A major undersea volcano
B)   A huge undersea meteor crater
C)   A deep ocean trench along a subduction zone
D)   A system of 25 major oceanic transform faults
E)   Slumps and debris avalanches formed by at least 70 volcanic flank collapsesF) D) and E)
G) B) and D)

Question 15

A Grand Banks earthquake (18 November 1929) triggered the __________.

Accepted Answer

A)   landslide on the Burin Peninsula which set off tsunamis toward Europe
B)   submarine movement of a sediment mass which set off tsunamis
C)   uplift of ocean floor which set off tsunamis
D)   down-drop of ocean floor which set off tsunamis
E)   ocean ridge spreading which didn't set off a tsunami.F) A) and B)
G) B) and C)

Question 16

Tsunami can travel at speeds of ____________ kilometres per hour.

Accepted Answer

A)   25
B)   50
C)   125
D)   550
E)   725F) A) and C)
G) None of the above

Question 17

Which of the following best describes what happens to tsunami waves as they move from the open ocean and towards the shallow water near the shore of the coastline?

Accepted Answer

A)   The waves decrease in amplitude and their velocity remains constant.
B)   The waves increase in amplitude and decrease in velocity.
C)   The waves maintain a constant amplitude and velocity.
D)   The waves increase in amplitude and increase in velocity.E) C) and D)
F) B) and C)

Question 18

Tsunami is a Japanese word that means ____________________.

Accepted Answer

A)   big wave
B)   killer wave
C)   dragon wave
D)   island wave
E)   harbour waveF) B) and D)
G) A) and C)

Question 19

In a tsunami hazard map of Canada,Hudson Bay was labelled as a coastal area exposed to tsunamis from local sources: landslides and earthquakes.

Accepted Answer

A) True 
 B)False

Question 20

Before the first big wave of a tsunami,the sea may either ________ or suddenly _______.

Accepted Answer

A)   churn up;withdraw
B)   withdraw;rise
C)   be calm;rise
D)   withdraw;be calm
E)   none of these choices are correctF) B) and E)
G) A) and C)

Exam 7: Tsunamis

Tsunami is a Japanese word that means ____________________.

Correct AnswerverifiedShow Answer

In a tsunami hazard map of Canada,Hudson Bay was labelled as a coastal area exposed to tsunamis from local sources: landslides and earthquakes.

Correct AnswerverifiedShow Answer

The 2004 Indian Ocean tsunami killed an estimated 245,000 people in ____ countries.

Correct AnswerverifiedShow Answer

Tsunami generated from a megathrust earthquake on the Cascadia Subduction Zone could devastate the cities of Vancouver and Victoria.

Correct AnswerverifiedShow Answer

While California has experienced many deadly earthquakes,it has never experienced fatalities from tsunami.

Correct AnswerverifiedShow Answer

The great 1964 Alaska earthquake (M 9.2) set off a tsunami that killed 122 people along the state's sparsely populated coastline.This tsunami also killed 12 of the curious people in ___________.

Correct AnswerverifiedShow Answer

Before the first big wave of a tsunami,the sea may either ________ or suddenly _______.

Correct AnswerverifiedShow Answer

When wind caused waves approach the shoreline,friction causes them to slow and their wavelengths ________ resulting in waves _________.

Correct AnswerverifiedShow Answer

A Grand Banks earthquake (18 November 1929) triggered the __________.

Correct AnswerverifiedShow Answer

It is virtually impossible for ships in the open ocean to survive a passing tsunami.

Correct AnswerverifiedShow Answer

The tsunami that devastated the south coast of Newfoundland in 1929 was caused by a ______________.

Correct AnswerverifiedShow Answer

Which of the following best describes what happens to tsunami waves as they move from the open ocean and towards the shallow water near the shore of the coastline?

Correct AnswerverifiedShow Answer

A tsunami source was revealed by the mapping of the ocean bottom around the Hawaiian Islands.What did geologists discover on the seafloor in this area?

Correct AnswerverifiedShow Answer

The Pacific Tsunami Warning Center (PTWC) declares a "tsunami watch" when an earthquake meeting three criteria is identified.Which of the following characteristics is not one not needed for a watch to be issued?

Correct AnswerverifiedShow Answer

The 1975 tsunami at Kitimat,BC was generated by _______.

Correct AnswerverifiedShow Answer

Tsunami can travel at speeds of ____________ kilometres per hour.

Correct AnswerverifiedShow Answer

Prior to the 2004 event,the last major tsunami in the Indian Ocean struck in 1883 and killed about 36,000 people.This tsunami was caused by ___________________.

Correct AnswerverifiedShow Answer

The destructive power of a tsunami is due mostly to the great height of the wave.

Correct AnswerverifiedShow Answer

Buoys are used to trigger tsunami warnings because the large wave passing under them lifts them much higher than wind generated waves,signaling a tsunami wave.

Correct AnswerverifiedShow Answer

Tsunamis typically have _________________________ relative to wind-blown waves.

Correct AnswerverifiedShow Answer

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Before the first big wave of a tsunami,the sea may either __ or suddenly _.

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When wind caused waves approach the shoreline,friction causes them to slow and their wavelengths resulting in waves _.

Correct Answer
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