Natural Events: Earth's Dynamic Processes
Explore the causes, effects, and predictability of various natural events such as earthquakes, volcanic eruptions, tsunamis, and hurricanes at a Grade 12 level.
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Natural Events: Earth's Dynamic Processes
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Read each question carefully and provide thoughtful, detailed answers. For multiple-choice questions, select the best option. For short answer questions, use the provided lines to write your response.
1. Which type of seismic wave causes the most damage during an earthquake due to its complex motion and slower speed?
P-waves
S-waves
Love waves
Rayleigh waves
2. The image below illustrates the process of an earthquake. What geological feature is primarily responsible for generating the majority of earthquakes?
Mountain ranges
Oceanic trenches
Fault lines
River deltas
3. Explain the primary difference between effusive and explosive volcanic eruptions, and provide an example of a type of volcano associated with each.
4. Refer to the volcano cross-section below. Identify and describe the role of the 'magma chamber' and the 'vent' in a volcanic eruption.
5. Tsunamis are typically generated by large-scale displacement, most commonly caused by submarine earthquakes.
6. In the open ocean, tsunamis have a very long and travel at extremely high speeds, making them difficult to detect without specialized equipment.
7. As a tsunami approaches the coast, its speed decreases, but its dramatically increases, leading to devastating coastal inundation.
8. Hurricanes primarily form over warm ocean waters with sea surface temperatures of at least 26.5°C (80°F).
True
False
9. The 'eye' of a hurricane is characterized by intense rainfall and strong winds due to the rapid upward movement of air.
True
False
10. Discuss at least two technological advancements that have significantly improved our ability to predict or monitor natural events like hurricanes or tsunamis. Explain how each advancement contributes to hazard mitigation.