14.7 SkillBuilder activity CONCLUDING AND DECISION-MAKING Use an atlas or Google Earth to locate Lituya Bay. 1. Draw a map to show the location. 2. Use the World’s biggest tsunami weblink in the Resources panel to listen to eyewitness accounts of the tsunami that occurred there. 3. Explain how this helps give you a sense of the scale of this event.
14.7
Exercise
Learning pathways LEVEL1 1, 3, 6
LEVEL2
LEVEL3
2, 4, 7, 9
5, 8, 10
REMEMBER AND UNDERSTAND 1. Determine whether the following statements are True or False.
a. Most tsunamis occur in the Atlantic Ocean. b. Underwater landslides can trigger tsunamis. c. In deep water, tsunamis can travel at up to 970 km/h and can be undetectable by boats. d. A tsunami is a single wave. 2. Study FIGURE2 . Use your own words to explain how a tsunami occurs. 3. Determine whether the following statement is True or False. A tsunami doesn’t change when it comes into shallow water.
4. Elaborate why there is still danger after the first wave of a tsunami strikes. 5. Read the 14.7 case study and explain the causes of the 2011 Japanese tsunami. 6. Identify how big were the waves that struck Japan.
A. 3metres B. 6metres
C. 12metres D. 20metres ANALYSE AND APPLY 7. Read through the 14.7 case study. Discuss how the location of the epicentre of the earthquake that caused the Japanese tsunami impacted the ability of people to prepare for the incoming tsunami. 8. Study FIGURE3 . a. Estimate the size of the fault plane that moved vertically during this quake. b. Discuss why this was significant. c. State which tectonic plates were involved in this event. 9. Study the photo of the Japanese tsunami in FIGURE4 . a. Imagine you are a radio news reporter. Describe what you see and what might be happening to people in the area. b. Imagine you were a Sendai resident. Describe what you would have done to ensure your safety during the tsunami. EVALUATE AND COMMUNICATE 10. Create a flow chart or cartoon strip that explains the journey of a tsunami from creation through to coming ashore. Answers and sample responses for this topic are available online.
TOPIC14 Geomorphological processes and hazards
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