O Level Geography Resources Sustainability Quiz

O-Level Geography Quiz - Resources Sustainability (Answer Key)

Total Marks: 40

Section A: Resource Availability and Management

1. Define water stress. [1]

• Answer: Water stress occurs when the demand for water exceeds the available amount during a certain period or when poor quality restricts its use.
• Marking Note: Accept "shortage of water relative to demand."

2. Describe the distribution of countries facing extremely high water stress. [2]

• Answer:
  1. Concentrated in North Africa and the Middle East.
  2. Also found in parts of Central Asia and Northern India/Pakistan.
• Marking Note: 1 mark for identifying a specific region. 1 mark for a second region or noting clustering.

3. Explain two physical factors contributing to water scarcity. [4]

• Answer:
  1. Low Precipitation/Arid Climate: Located in arid zones with low annual rainfall, limiting natural replenishment. (2 marks)
  2. High Evaporation Rates: High temperatures increase evaporation from surface water, reducing availability. (2 marks)

4. Calculate percentage from local, sustainable sources. [2]

• Working: Rainwater (10%) + Desalinated (25%) + Recycled (35%) = 70%.
• Answer: 70%
• Marking Note: 1 mark for working, 1 mark for answer.

5. Advantage and Disadvantage of desalination. [4]

• Advantage: Reliable, drought-proof supply independent of rainfall. (2 marks)
• Disadvantage: High energy consumption/cost; brine waste harms marine ecosystems. (2 marks)

Section B: Food Security and Agricultural Intensification

6. Importance of diversifying water sources. [2]

• Answer: Reduces reliance on a single source, minimizing risk if one fails (e.g., drought, political issues). Ensures resilience.
• Marking Note: 1 mark for risk reduction, 1 mark for elaboration.

7. Identify two features of vertical farming. [2]

• Answer:
  1. Growing crops in stacked layers indoors.
  2. Use of controlled environment (LEDs, hydroponics).
• Marking Note: 1 mark per valid feature.

8. How vertical farming contributes to food security in land-scarce countries. [4]

• Answer:
  1. Land Efficiency: Maximizes yield per square meter by growing upwards.
  2. Year-round Production: Controlled environment allows multiple harvests, ensuring consistent supply.
• Marking Note: 2 marks per point (identification + explanation).

9. "Vertical farming is the best solution for global food shortages." To what extent do you agree? [4]

• Answer Framework:
  • Agree: High yield, low water use, reduces food miles.
  • Disagree: High capital/energy costs; limited to high-value crops (not staples like rice); not affordable for developing nations.
  • Conclusion: Useful supplement for urban areas but not the sole global solution.
• Marking Note: L2 (3-4 marks) for balanced view with specific reasons and conclusion.

10. Describe the process of eutrophication. [3]

• Answer:
  1. Excess fertilizers run off into water.
  2. Causes algal blooms blocking sunlight.
  3. Decomposition depletes oxygen, causing fish death.
• Marking Note: 1 mark for each correct stage.

Section C: Energy and Sustainable Development

11. Social and Economic impacts of eutrophication. [2]

• Social Impact: Loss of recreation/health risks from toxic algae.
• Economic Impact: Loss of fishing income; increased water treatment costs.
• Marking Note: 1 mark for each valid impact.

12. Compare environmental impact of coal vs. wind. [2]

• Answer: Coal releases high CO2/pollutants (climate change/acid rain). Wind has zero operational emissions but may impact bird/marine habitats.
• Marking Note: 1 mark for coal, 1 mark for wind.

13. Why transition to renewable energy? [3]

• Answer:
  1. Mitigate climate change (reduce GHG).
  2. Fossil fuels are finite.
  3. Improve energy independence.
• Marking Note: 1 mark per valid reason.

14. Challenge for developing countries adopting renewables. [2]

• Answer: High initial infrastructure costs and lack of technical expertise.
• Marking Note: 1 mark for challenge, 1 mark for explanation.

15. Define sustainable development. [3]

• Answer: Development meeting present needs without compromising future generations' ability to meet their needs. Balances economic, social, and environmental factors.
• Marking Note: 1 mark for present needs, 1 mark for future generations, 1 mark for balance/elaboration.

Section D: Integrated Resource Management

16. Distinguish between water conservation and water preservation. [2]

• Answer:
  • Conservation: Sustainable use and management of water resources to prevent waste (e.g., fixing leaks, efficient irrigation).
  • Preservation: Keeping water resources in their natural state, untouched by human use (e.g., protecting a wilderness lake from development).
• Marking Note: 1 mark for each correct definition/distinction.

17. Explain how a shortage in water can impact energy (Water-Energy-Food Nexus). [3]

• Answer:
  1. Thermal power plants (coal, nuclear) require large amounts of water for cooling.
  2. Water scarcity limits the operation of these plants, reducing energy output.
  3. This leads to energy shortages or higher energy costs, affecting industrial and domestic supply.
• Marking Note: 1 mark for link (cooling), 1 mark for consequence (reduced output), 1 mark for broader impact.

18. Evaluate the effectiveness of rainwater harvesting in urban vs. rural areas. [4]

• Answer:
  • Urban: Highly effective for non-potable uses (toilets, cleaning) due to large roof catchment areas; reduces strain on municipal supply. However, limited space for storage tanks.
  • Rural: Effective for irrigation and livestock; easier to implement large-scale storage (ponds). However, may lack infrastructure for filtration/purification for drinking.
  • Evaluation: Both are effective but serve different primary needs (urban: supply relief; rural: agricultural support).
• Marking Note: 2 marks for urban analysis, 2 marks for rural analysis/comparison.

19. Explain two reasons why food miles are a concern for sustainable development. [4]

• Answer:
  1. Carbon Footprint: Long-distance transport (air/road) burns fossil fuels, increasing greenhouse gas emissions and contributing to climate change. (2 marks)
  2. Local Economic Impact: Importing food can undermine local farmers and reduce local food security/resilience against global supply chain disruptions. (2 marks)
• Marking Note: 2 marks per reason (1 for identification, 1 for explanation).

20. "Economic growth always leads to environmental degradation." To what extent do you agree? [5]

• Answer Framework:
  • Agree: Historical industrialization relied on resource exploitation and pollution (e.g., deforestation, air pollution). Rapid growth often prioritizes profit over environmental regulation.
  • Disagree: Modern sustainable growth models (green economy) decouple growth from degradation. Technology allows for cleaner production (renewables, recycling). Environmental regulations can enforce protection while maintaining growth.
  • Conclusion: While early-stage growth often causes degradation, it is not "always" the case if sustainable policies and technologies are adopted.
• Marking Note:
  • L1 (1-2 marks): One-sided or vague.
  • L2 (3-4 marks): Some balance, limited detail.
  • L3 (5 marks): Well-balanced argument, specific examples, clear conclusion acknowledging nuance.