Secondary 3 Geography Resources Sustainability Quiz

Secondary 3 Geography Quiz - Resources Sustainability (Answer Key)

Total Marks: 50

Section A: Concepts of Sustainability and Ecosystem Services

1. Define the term ‘sustainable development’. [2]

• Answer: Development that meets the needs of the present generation [1] without compromising the ability of future generations to meet their own needs [1].
• Note: Must mention both "present needs" and "future generations/needs".

2. Classify ecosystem services. [4]

• (a) Pollination: Supporting [1]
• (b) Timber: Provisioning [1]
• (c) Hiking/Relaxation: Cultural [1]
• (d) Soil formation: Supporting [1]
• Note: Accept "Regulating" for pollination if justified as pest control, but Supporting is standard for foundational processes.

3. Explain one way urban green spaces provide regulating ecosystem services. [3]

• Identification: Temperature regulation / Cooling effect [1].
• Explanation: Trees/plants provide shade and release water vapour through transpiration [1], which lowers the ambient air temperature and reduces the Urban Heat Island effect [1].
• Alternative: Air purification (trapping dust/pollutants).

4. Distinguish between economic and social sustainability. [4]

• Economic Sustainability: Focuses on maintaining economic growth, profitability, and resource efficiency without depleting capital. It ensures jobs and income stability [2].
• Social Sustainability: Focuses on human well-being, equity, community cohesion, and quality of life. It ensures fair access to services and social justice [2].
• Note: 1 mark for each definition, 1 mark for clarity/distinction.

5. Explain "taken for granted" statement with an urban hazard example. [3]

• Meaning: People do not value ecosystem services (like drainage or air cleaning) until they fail [1].
• Example: When urban wetlands (which absorb rainwater) are destroyed for construction [1], the loss of this regulating service leads to increased flash flooding during heavy rain [1].

Section B: Urban Hazards and Resource Management

6. Identify two common environmental hazards in urban neighbourhoods. [2]

• Any two of: Air pollution, Noise pollution, Flash flooding, Urban Heat Island effect, Waste accumulation. [1] each.

7. Explain how traffic congestion is an economic and environmental hazard. [4]

• Economic: Time wasted in traffic reduces productivity and increases fuel costs for businesses and individuals [2].
• Environmental: Idling vehicles emit higher levels of greenhouse gases (CO2) and pollutants (NOx), worsening air quality [2].

8. Explain two physical characteristics contributing to the Urban Heat Island effect. [4]

• Characteristic 1: Dark surfaces (asphalt/concrete) have low albedo, absorbing more solar radiation than natural surfaces [2].
• Characteristic 2: High density of buildings traps heat and blocks wind flow, preventing cooling [2].
• Alternative: Lack of vegetation reduces cooling from transpiration.

9. Evaluate one potential conflict regarding replacing a car park with a garden. [3]

• Stakeholder A (Business Owners): May oppose because loss of parking reduces customer accessibility and sales [1.5].
• Stakeholder B (Residents): May support because it improves air quality, aesthetics, and community space [1.5].
• Note: Must identify conflicting interests.

10. Describe one strategy for sustainable water management in Singapore. [3]

• Strategy: NEWater (Recycled Water) [1].
• Explanation: Used water is treated using advanced membrane technologies and UV disinfection to produce high-grade reclaimed water [1]. This reduces reliance on rainfall and imports, ensuring long-term supply [1].
• Alternative: Desalination or Active Beautiful Clean (ABC) Waters.

Section C: Building Sustainable Communities

11. What is meant by ‘sense of place’? [2]

• Answer: The emotional attachment, meaning, or identity that people associate with a specific location [1], often developed through personal experiences, memories, or social interactions [1].

12. Explain how community participation builds sustainable neighbourhoods. [3]

• Explanation: Involving residents in decision-making (e.g., planning parks) ensures facilities meet actual local needs [1]. This fosters a sense of ownership [1], leading to better maintenance and social cohesion, which are key to social sustainability [1].

13. Identify the sustainability dimension of solar panels/rainwater harvesting. [3]

• Dimension: Environmental Sustainability [1].
• Explanation: These features reduce reliance on non-renewable energy and municipal water supplies [1], thereby lowering the carbon footprint and resource depletion associated with the housing estate [1].
• Note: Economic is acceptable if justified by long-term cost savings, but Environmental is primary.

14. Explain one challenge in balancing economic growth and environmental protection. [3]

• Challenge: Land scarcity [1].
• Explanation: Developing land for industrial or commercial use boosts the economy (jobs/GDP) [1], but often requires clearing green spaces or wetlands, which reduces biodiversity and ecosystem services [1].

15. Suggest one individual action for waste reduction and explain its benefit. [3]

• Action: Recycling or Reducing single-use plastics [1].
• Explanation: This reduces the volume of waste sent to landfills (like Semakau) [1], extending the lifespan of the landfill and reducing pollution from waste incineration [1].

Section D: Data Interpretation and Application

16. Calculate total percentage of non-renewable energy. [1]

• Answer: 70% (40% Coal + 30% Natural Gas).

17. Suggest one reason for reliance on coal. [2]

• Reason: Coal is often cheaper and more readily available than renewable alternatives [1].
• Explanation: Existing infrastructure is built for coal, making the transition costly and technically difficult in the short term [1].

18. Suggest which renewable source to expand in a land-scarce urban environment. [3]

• Choice: Solar Power [1].
• Explanation: Solar panels can be installed on existing rooftops, vertical surfaces, or reservoirs (floating solar), requiring no additional land clearance [1]. Wind and Hydro typically require large open spaces or specific geographical features not found in dense cities [1].

19. Explain how shifting from coal to solar mitigates climate change. [3]

• Mechanism: Coal combustion releases large amounts of CO2, a greenhouse gas [1]. Solar power generates electricity without direct emissions [1].
• Result: Reducing CO2 emissions lowers the enhanced greenhouse effect, slowing down global warming [1].

20. "Technology alone cannot solve sustainability issues." Do you agree? [4]

• View: Agree [1].
• Reason: Technology (e.g., efficient appliances) can be undermined by excessive consumption behaviours (e.g., leaving lights on) [1.5].
• Elaboration: Effective sustainability requires policy (laws/taxes) and behavioural change (education/values) to ensure technology is used correctly and resources are not overconsumed [1.5].
• Note: Disagree is acceptable if well-argued (e.g., tech breakthroughs make green energy cheaper than fossil fuels, driving automatic adoption), but Agree is generally stronger in Geography syllabus context.