Tsunami Dynamics and Impact
A Grade 12 science worksheet exploring the causes, characteristics, and impacts of tsunamis, including their formation, wave behavior, and societal effects.
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Tsunami Dynamics and Impact
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Read each question carefully and answer to the best of your ability. For multiple-choice questions, select the best option. For short answer questions, provide concise and accurate responses. Refer to the provided diagram for relevant questions.
1. Which of the following is the primary cause of most tsunamis?
Strong winds generating large waves
Underwater volcanic eruptions
Submarine earthquakes causing vertical displacement of the seafloor
Changes in ocean atmospheric pressure
2. As a tsunami approaches a coastline, what happens to its speed and height?
Speed increases, height decreases
Speed decreases, height increases
Both speed and height increase
Both speed and height decrease
3. Examine the diagram below:
Based on the provided diagram and your knowledge, explain the key differences between a tsunami wave in the deep ocean and near the coast. Focus on wavelength, wave height, and speed.
4. The region of the Pacific Ocean with a high frequency of earthquakes and volcanic eruptions, and thus a high risk of tsunamis, is known as the .
5. Tsunami detection systems often rely on seafloor pressure sensors called , which transmit data to buoys on the surface.
6. A single tsunami event typically consists of only one large wave.
True
False
7. The leading edge of a tsunami often appears as a rapidly rising tide rather than a towering breaking wave.
True
False
8. Describe at least two significant environmental impacts of a major tsunami event on coastal ecosystems.
9. Propose two effective strategies that coastal communities can implement to mitigate the risks and damage caused by tsunamis.