Ocean 115 - Introduction to Oceanography » Spring 2022 » Megastunami

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Question #1
What did the tree ring study in Latuya Bay, Alaska show?
A.   A violent force had hit the trees at some point in the past
B.   Earthquakes were common in the area
C.   Gold dredging was common there
D.   There was oil deposits beneath the trees
Question #2
How was the cause of the tree line discovered?
A.   By aerial surveillance
B.   By historical documents
C.   By eyewitness accounts of another tsunami
D.   By seismic data
Question #3
How is a seismic tsunami generated?
A.   By volcanoes erupting and pushing ash into the ocean
B.   By lateral movement of rocks breaking during earthquakes offsetting the water
C.   By the up and down motion of rocks during earthquakes offsetting the water
D.   By landslides hitting the ocean and pushing the water away
Question #4
Why are landslide-generated tsunamis a greater threat?
A.   Seismic tsunamis offset the water upwards which means they are limited in height, landslide tsunamis offset the water all the way to the bottom so their height is limited only by the depth of the ocean, which, can be thousands of meters
B.   False, landslide tsunamis are not a greater threat
C.   Seismic tsunamis have to remain in the local area and landslide tsunamis travel over the whole ocean
D.   Seismic tsunamis travel at a slower speed than landslide tsunamis
E.   They are more common than seismic tsunamis
Question #5
What were they testing in Zurich, Switzerland?
A.   They were testing landslides that generate megatsunamis, they physically model a landslide’s impact into water
B.   They were trying to see if landslides could cause tsunamis
C.   They were testing to see how long a landslide will occur before it hits the water
D.   They were testing earthquakes that generate megatsunamis, they physically model an earthquake’s impact on the water
E.   They were trying to predict the next time a volcano will erupt in the Canary Islands
Question #6
What areas are most prone to landslide tsunamis?
A.   Glaciers
B.   Volcanic islands
C.   River valleys
D.   Harbors
E.   Tropical beaches
Question #7
Why is this so (your answer from question six is used here)?
A.   The frequency of rainfall
B.   The amount of lightning
C.   The way they formed
D.   The overall temperature
E.   The weight of the rocks in the area
Question #8
Can water trapped between the dikes, becoming heated and expanded, cause the flanks of the volcano to collapse?
A.   Yes
B.   No
Question #9
What are two lines of evidence for a megatsunami hitting the Bahamas?
A.   Carved into the rocks were inscriptions of past tsunamis and bat dropping showing the bats could not land under the wave.
B.   Huge waves reshape some of the islands, blasting the chevron shaped ridges. The waves also ripped vast boulders from off the ocean floor and dropped them on land.
C.   Huge waves reshape some of the islands, blasting the chevron shaped ridges. The waves also left the remains of whales high up on the local mountains.
D.   The waves left the remains of whales high up on the local mountains and ripped vast boulders from off the ocean floor and dropped them on land.
Question #10
What cities in the video are particularly vulnerable to megatsunamis?
A.   Boston, Honolulu
B.   Honolulu and Miami
C.   London, Paris, New York
D.   Honolulu, Los Angeles, Anchorage
E.   Boston, New York, Miami

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