Unit 4, Tsunamis Wikipedia Homework
In Wikipedia, look up "Tsunami", scroll down to "Drawback", and answer this question: True or False: The crest (ridge) of a tsunami wave always arrives before the trough. True False
False
In Wikipedia, look up "Hawaiian Islands", scroll down to "Tsunamis", and answer this question: True or False: Though Hawaii is subject to tsunamis caused by earthquakes anywhere along the Pacific shore, tsunamis may also originate from the Hawaiian Islands. True False
True
In Wikipedia, look up "Tsunami", scroll down to "Characteristics", and answer this question: True or False: A large tsunami may feature multiple waves arriving over a period of hours. True False
True
In Wikipedia, look up "Geiranger" and answer this question: What is the danger to Geiranger? a. It is under constant threat from landslides that could cause a tsunami that could destroy the town. b. It is under constant threat from earthquakes that could cause a tsunami that could destroy the town. c. It is under constant threat from a volcano that could cause a tsunami that could destroy the town. d. All the above
a. It is under constant threat from landslides that could cause a tsunami that could destroy the town.
In Wikipedia, look up "2004 Indian Ocean earthquake and tsunami" and answer this question: Which of the following statements is true about the 2004 tsunami? a. It killed about 300 thousand people making it one of the deadliest natural disasters in recorded history. b. It was caused by an underwater landslide triggered by the earthquake. c. The tsunami wave reached heights of 100 m (300 feet). d. All the above
a. It killed about 300 thousand people making it one of the deadliest natural disasters in recorded history.
In Wikipedia, look up "1958 Lituya Bay earthquake and megatsunami" and answer this question: Which statement about the Lituya Bay tsunami is true? a. It caused the most loss of life of any tsunami b. It was the largest tsunami in terms of how high up on land it reached. c. It is the only manmade tsunami to cause fatalities d. It was a volcanic eruption triggered by an earthquake
b. It was the largest tsunami in terms of how high up on land it reached.
In Wikipedia, look up "Tsunami", scroll down to "Characteristics", and answer this question: What happens to a tsunami wave as it approaches the coast and the waters become shallow? a. Speed decreases and amplitude decreases. b. Speed decreases and amplitude increases. c. Speed increases and amplitude decreases. d. Speed increases and amplitude increases.
b. Speed decreases and amplitude increases.
In Wikipedia, look up "Tsunami", scroll down to "Characteristics", and answer this question: Which statement best characterizes tsunami waves over deep water? a. They travel very fast (over 800 kilometers per hour) with great heights (10s of meters) b. They travel very fast (over 800 kilometers per hour) with low heights (about a meter) c. They travel very slow (less than 30 kilometers per hour) with great heights (10s of meters) d. They travel very slow (less than 30 kilometers per hour) with low heights (about a meter)
b. They travel very fast (over 800 kilometers per hour) with low heights (about a meter)
In Wikipedia, look up "Tsunami", scroll down to "Characteristics", and answer this question: Which has a larger wavelength? a. Windblown waves b. Tsunami waves c. Windblown and tsunami waves can have similar wavelengths
b. Tsunami waves
In Wikipedia, look up "Tsunami", scroll down to "Seismicity", and answer this question: Which direction of water displacement causes a tsunami to be generated by an earthquake? a. Horizontal b. Vertical c. Both horizontal and vertical
b. Vertical
In Wikipedia, look up "Tsunami", scroll down to "Characteristics" and answer this question: If you were in a boat over deep water and a tsunami wave passed beneath you, how long would it take for the wave to lift your boat up and down? a. 10-20 seconds b. 1-2 minutes c. 20-30 minutes d. 1-2 hours
c. 20-30 minutes
In Wikipedia, look up "Seawall" and answer this question: What is a seawall? a. A wall of water induced by a tsunami or strong winds. b. A wall on top of a cliff that is used to lookout for tsunami waves. c. A coastal defense to protect areas from the action of the sea. d. An underwater cliff that can cause a large wave to break far out at sea.
c. A coastal defense to protect areas from the action of the sea.
In Wikipedia, look up "Deep-ocean Assessment and Reporting of Tsunamis" and answer this question: How does the DART system detect tsunamis? a. A surface buoy that senses when a broad wave passes. b. A satellite measures wave heights and detects the tsunami by its long wavelength. c. An instrument detects water pressure change on the seafloor. d. All the above
c. An instrument detects water pressure change on the seafloor.
In Wikipedia, look up "2011 Tōhoku earthquake and tsunami", scroll down to "Tsunami", and answer this question: Which of the following statements is true about the 2011 tsunami? a. It killed about 300 thousand people making it one of the deadliest natural disasters in recorded history. b. It was caused by an underwater landslide triggered by the earthquake. c. Like the 2004 Indian Ocean earthquake and tsunami, the tsunami was far more deadly and destructive than the earthquake. d. All the above
c. Like the 2004 Indian Ocean earthquake and tsunami, the tsunami was far more deadly and destructive than the earthquake.
In Wikipedia, look up "Chicxulub crater", scroll down to "Effects", and answer this question: What was the limiting factor that may have limited the asteroid induced tsunami's height? a. The low impact velocity b. The low angle of impact c. The relatively shallow sea in the area of the impact d. All the above
c. The relatively shallow sea in the area of the impact
In Wikipedia, look up "1883 eruption of Krakatoa" and answer this question: Which of the following statements is true? a. The explosions were so violent that they were heard 3,000 miles away. b. At least 36,000 deaths are attributed to the eruption and the tsunamis it created. c. The 1969 disaster film Krakatoa, East of Java got the title wrong as Krakatoa is west of Java. d. All the above
d. All the above
In Wikipedia, look up "Tsunami" and answer this question: Which of the following can induce a tsunami? a. Volcanic eruptions b. Landslides c. Earthquakes d. All the above
d. All the above
In Wikipedia, look up "Volcanic tsunami" and answer this question: What of the following volcanic processes can cause a tsunami? a. Caldera collapse b. Pyroclastic flows c. Avalanches d. All the above
d. All the above
In Wikipedia, look up "Tsunami", scroll down to "Characteristics", and answer this question: Why does tsunami mean "harbor wave" in Japanese? a. Because harbors suffer more damage from tsunamis than any other type of shoreline. b. Because ancient Japanese thought these waves originated inside harbors. c. Because harbors where the only safe location from these large waves. d. Because sometimes a village's fishermen would sail out and encounter no unusual waves while out at sea, then come back to find their village devastated by a huge wave.
d. Because sometimes a village's fishermen would sail out and encounter no unusual waves while out at sea, then come back to find their village devastated by a huge wave.
In Wikipedia, look up "Fukushima Daiichi nuclear disaster", scroll down to "2008: Tsunami study ignored", and answer this question: What was headquarters' response to a 2008 in-house study that identified an immediate need to better protect the facility from the possibility of tsunami waves up to 10.2 meters (33 ft) high? a. Officials immediately began plans to build a seawall to protect the facility from a tsunami. b. Officials immediately began plans to install backup generators and water pumps to ensure that cooling of the fuel rods would not be affected by the tsunami. c. Officials immediately began plans to move the powerplant to higher ground. d. Officials insisted that such a risk was unrealistic and did not take the prediction seriously.
d. Officials insisted that such a risk was unrealistic and did not take the prediction seriously.
