Secondary 4 Geography Physical Geography Quiz

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Secondary 4 Geography Quiz - Physical Geography

Name: __________________________
Class: __________________________
Date: __________________________
Score: ________ / 75

Duration: 60 Minutes
Total Marks: 75 Marks

Instructions:

1. Answer all questions in the spaces provided.
2. Use geographical terminology accurately.
3. Pay attention to the mark allocation for each question.

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Section A: Weather and Climate (Questions 1-7)

1. Distinguish between "weather" and "climate". [2]
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2. Explain how the Earth's rotation affects the variation of air temperature across a day. [3]
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3. Describe the process of convectional rainfall. [4]
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4. Explain why regions near the equator generally experience high temperatures throughout the year. [3]
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5. Compare the characteristics of a tropical rainforest climate with a tropical monsoon climate. [4]
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6. Explain how altitude influences the air temperature of a location. [3]
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7. Describe the role of the Intertropical Convergence Zone (ITCZ) in influencing rainfall patterns in the tropics. [4]
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Section B: Climate Change (Questions 8-13)

8. Define "climate change" and provide one indicator that it is occurring. [2]
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9. Explain how volcanic eruptions can lead to a temporary decrease in global air temperatures. [3]
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10. Describe the "greenhouse effect" and identify the primary human activity contributing to it. [4]
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11. Explain how the melting of polar ice caps contributes to a positive feedback loop in global warming. [4]
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12. Discuss one impact of climate change on human health systems. [3]
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13. Explain the difference between a "mitigation strategy" and an "adaptation strategy" in the context of climate change. [4]
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Section C: Tectonics and Hazards (Questions 14-20)

14. Describe the internal structure of the Earth, mentioning the three primary layers. [3]
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15. Explain the mechanism of convection currents in the mantle and how they drive plate movement. [4]
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16. Compare the landforms created at a divergent plate boundary versus a convergent plate boundary. [4]
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17. Explain why earthquakes are more frequent along plate boundaries than in the middle of tectonic plates. [3]
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18. Using the disaster risk equation ($\text{Risk} = \frac{\text{Hazard} \times \text{Vulnerability}}{\text{Capacity}}$), explain why two countries experiencing the same magnitude earthquake may have vastly different casualty rates. [5]
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19. Describe the primary and secondary hazards associated with a volcanic eruption. [4]
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20. Evaluate the effectiveness of strict building codes as a preparedness measure for earthquakes. [6]
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Answer Key - Secondary 4 Geography Quiz (Physical Geography)

Section A: Weather and Climate

1. Weather: Short-term state of the atmosphere at a specific place and time (e.g., rainy today). Climate: Long-term average of weather patterns over a period (usually 30 years). (2m)
2. Rotation causes different parts of the Earth to face the sun at different times. This creates the day-night cycle, leading to diurnal temperature variation (heating during day, cooling at night). (3m)
3. Solar radiation heats the ground $\rightarrow$ air above warms and rises $\rightarrow$ air cools as it ascends $\rightarrow$ water vapor condenses into clouds $\rightarrow$ heavy rain falls. (4m)
4. High angle of incidence of solar radiation; the sun's rays are concentrated over a smaller area, providing more intense heat. (3m)
5. Rainforest: High temp and high rainfall year-round, minimal seasonal variation. Monsoon: High temp year-round, but distinct wet and dry seasons driven by seasonal wind shifts. (4m)
6. Temperature decreases with increasing altitude (lapse rate). Air becomes less dense at higher altitudes, holding less heat. (3m)
7. ITCZ is a low-pressure zone where trade winds converge $\rightarrow$ forces air to rise $\rightarrow$ leads to frequent convectional rainfall and thunderstorms. (4m)

Section B: Climate Change

8. Definition: Long-term shift in global or regional climate patterns. Indicator: Rising global mean temperatures / rising sea levels. (2m)
9. Eruptions release aerosols (sulfur dioxide) into the stratosphere $\rightarrow$ these reflect incoming solar radiation back into space $\rightarrow$ less heat reaches the surface. (3m)
10. Effect: Greenhouse gases (CO2, CH4) trap long-wave radiation emitted from Earth's surface, warming the atmosphere. Activity: Burning of fossil fuels / Deforestation. (4m)
11. Ice has high albedo (reflects sunlight). Melting ice exposes darker ocean/land $\rightarrow$ absorbs more heat $\rightarrow$ increases temperature $\rightarrow$ causes more ice to melt. (4m)
12. Example: Increased temperatures expand the habitat of disease vectors (e.g., mosquitoes), leading to a higher prevalence of diseases like Dengue or Malaria. (3m)
13. Mitigation: Addressing the cause (e.g., switching to solar energy to reduce CO2). Adaptation: Adjusting to the effect (e.g., building sea walls to prevent flooding). (4m)

Section C: Tectonics and Hazards

14. Crust: Thin, rocky outer shell. Mantle: Semi-molten asthenosphere. Core: Dense center (outer liquid, inner solid). (3m)
15. Heat from the core creates currents in the mantle $\rightarrow$ hot magma rises, cools, and sinks $\rightarrow$ this "conveyor belt" motion drags the overlying tectonic plates. (4m)
16. Divergent: Mid-ocean ridges, rift valleys (plates move apart). Convergent: Fold mountains, ocean trenches, volcanic arcs (plates collide). (4m)
17. Plate boundaries are sites of intense friction and pressure buildup (stress). When this stress is released suddenly, it causes an earthquake. (3m)
18. Hazard (magnitude) is constant. However, a country with high Vulnerability (poor building codes, high population density) and low Capacity (poor emergency services, lack of education) will have higher risk/casualties. (5m)
19. Primary: Lava flows, pyroclastic flows, ash fall. Secondary: Lahars (mudflows), tsunamis (if eruption is undersea), climate cooling (ash blocking sun). (4m)
20. Effectiveness: Highly effective in reducing structural collapse and saving lives (e.g., Japan). Limitations: High cost of implementation, difficulty in retrofitting old buildings, does not prevent non-structural damage or panic. (6m)