Deck 7: Tsunamis

Question 1

Ocean water may recede from the shore before a tsunami wave strikes.

Answer 1

True

Question 2

Given their great speed, it is impossible to warn of a tsunami before it strikes land.

Answer 2

False

Question 3

The giant tsunami that struck Indonesia in 1883 was caused by a(n)

A)volcanic eruption
B)submarine landslide
C)earthquake
D)meteorite impact

Answer 3

A

Question 4

The Cascadia subduction zone in the Pacific Northwest generates tsunamis.

Question 5

The 2004 Indian Ocean tsunami originated off the coast of the country of ________.

Question 6

A tsunami watch means that tsunami is imminent and citizens should watch for its arrival.

Question 7

In what region did a major tsunami strike in late 2004?

A)eastern Pacific Ocean
B)western Pacific Ocean
C)Mediterranean Sea
D)Indian Ocean

Question 8

The 1700 AD tsunami generated by a large earthquake on the Cascadia subduction zone in the Pacific Northwest was dated most precisely using

A)Native American histories
B)Pacific Northwest sediments
C)Japanese tsunami records
D)early seismograms in China

Question 9

Tsunamis are generated by

A)rupture of faults on land
B)earthquake waves shaking the ocean floor
C)vertical displacement of ocean water
D)tides in the Pacific Ocean

Question 10

Tsunami ready status means that a community has planning and systems in place to respond to a tsunami warning.

Question 11

Tsunamis can cause damage thousands of miles from their source.

Question 12

The 2004 tsunami was generated by a(n)

A)volcanic eruption
B)submarine landslide
C)earthquake
D)meteorite impact

Question 13

Earthquakes are the only source of tsunamis.

Question 14

Tsunamis can be detected on the open ocean through

A)measurement of changes in pressure exerted on the sea bottom by the water column
B)shipboard observations of wave heights
C)seismometer records
D)measurement of wave speeds with Doppler radar

Question 15

Tsunami can take several hours to cross the ocean because

A)they move slowly
B)they are so high that wind impedes their progress
C)the travel distances are great
D)the ocean is too deep to transmit the waves

Question 16

The San Andreas Fault is highly likely to generate tsunamis.

Question 17

The 2004 Indonesian/Indian Ocean tsunami came as a complete surprise to scientists working in the area.

Question 18

The tsunami warning system in the region of the 2004 tsunami

A)failed
B)did not exist
C)saved many lives
D)gave inaccurate information

Question 19

It is safer to be on the open ocean than in the harbor when a tsunami arrives.

Question 20

The first step in producing a timely warning of a tsunami is

A)detection of a possible tsunami-producing earthquake
B)detection of a tsunami using a tsunameter
C)closely watching tidal gauges
D)calculation of ocean travel times

Question 21

The explosion of the volcano ________ in 1883 generated a giant tsunami that killed tens of thousands of people.

Question 22

A tsunami warning system includes seismometers, buoys with ________, and communication systems.

Question 23

The 1998 tsunami in Papua New Guinea was generated by a submarine ________.

Question 24

A megatsunami might be produced by ________ impact.

Question 25

________ in Thailand are at least one type of animal that appear to have sensed the impending tsunami.

Question 26

A(n) ________ is issued when a tsunami has been detected and is moving toward an area.

Question 27

The horizontal and vertical distance that a tsunami moves inland is called ________.

Question 28

The 2004 Indian Ocean tsunami caused death and damage as far away as ________.

Question 29

Once a large tsunami is generated, it is least noticeable in ________ water.