O Level Geography Practice Paper 2

Answer Key - TuitionGoWhere Practice Paper (AI) Version 2

Section A: Geographical Methods & Data Skills

Question 1 (a) Data Representation (3 marks)

• Suggestion: A bar chart (1).
• Justification: The x-axis would list the five distinct locations (categorical data) and the y-axis would represent the pleasantness score (1).
• Detail: This allows for a direct visual comparison of the magnitude of scores between locations (1).

(b) Reliability Evaluation (4 marks)

• Position: Not reliable / Partially reliable (1).
• Evidence: The sample size of 12 is too small to be representative of the entire population of the heritage district (1).
• Explanation: A few outliers or biased opinions could significantly skew the average results, leading to an inaccurate conclusion (1).
• Qualification: However, if stratified sampling was used to ensure different age groups were represented, it is slightly more valid than random sampling (1).

(c) Weighted Scores Calculation (3 marks)

• Assign weights: Strongly Agree (+2), Agree (+1), Disagree (-1), Strongly Disagree (-2) (1).
• Calculation: Multiply frequency by weight (e.g., $10 \times 2$ and $15 \times 1$ for positive; $5 \times -1$ and $2 \times -2$ for negative) (1).
• Summation: Add the totals of the positive and negative groups separately to find the net score (1).

(d) Improvement (2 marks)

• Suggestion: Increase the sample size (e.g., to 50 or 100 residents) (1).
• Reason: This reduces the impact of individual anomalies and increases the statistical representativeness of the data (1).

Question 2 (a) Trend Description (3 marks)

• Overall trend: Rainfall remains high throughout the year (1).
• Specifics: Peak rainfall occurs in [Month X] at [Value] and the lowest is in [Month Y] at [Value] (1).
• Pattern: Fluctuations are minimal, indicating a lack of a distinct dry season (1).

(b) Relationship Analysis (3 marks)

• Observation: High temperatures correlate with high rainfall (1).
• Mechanism: High temperatures lead to increased evaporation and convectional lifting of moist air (1).
• Result: This results in frequent afternoon thunderstorms, maintaining high monthly rainfall totals (1).

(c) Instrument (1 mark)

• Rain gauge (1).

(d) Graph Choice (3 marks)

• Continuity: Temperature is a continuous variable that changes gradually over time (1).
• Visualization: A line graph emphasizes the trend and the rate of change between months (1).
• Comparison: It allows for easier identification of seasonal peaks and troughs compared to discrete bars (1).

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Section B: Physical & Human Geography

Question 3 (a) Distribution (4 marks)

• Pattern: Concentrated in a linear belt/ring around the edges of the Pacific Ocean (1).
• Association: Earthquakes and volcanoes are closely associated/co-located (1).
• Specifics: High density along the "Ring of Fire" (1).
• Exception: Some isolated volcanoes/earthquakes occur away from boundaries (e.g., hotspots) (1).

(b) Processes (6 marks)

• Movement: Two plates move toward each other; the denser oceanic plate subducts beneath the continental plate (2).
• Melting: The sinking plate reaches the mantle and melts due to heat and friction, creating magma (2).
• Eruption: Magma rises through cracks in the overriding plate to form a volcanic arc (2).

(c) Vulnerability (5 marks)

• Building Codes: Developed countries have stricter seismic building codes (e.g., reinforced concrete) (2).
• Governance: Better emergency response systems, early warning alerts, and coordinated evacuation plans (2).
• Economic Capacity: Higher wealth allows for faster recovery and better medical infrastructure (1).

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Section C: Singapore & Sustainability

Question 4 (a) Four National Taps (6 marks)

• Local Catchment: Urban drainage and reservoirs capture stormwater (1).
• Imported Water: Agreements with Malaysia provide a baseline supply (1).
• NEWater: High-grade reclaimed water creates a closed-loop system, reducing waste (2).
• Desalination: Converting seawater to fresh water removes dependence on rainfall/imports (2).

(b) Evaluation Essay (9 marks)

• Agree (3 marks): Reclamation increases land area for industrial hubs (e.g., Jurong Island) and airports (Changi), attracting FDI and creating jobs, which is essential for a city-state with no hinterland.
• Disagree/Qualify (3 marks): Environmental cost is high (loss of mangroves, coral reefs). It is expensive and may not be sustainable long-term due to rising sea levels (climate change). Alternative solutions like "underground space" or "vertical urbanism" may be more sustainable.
• Conclusion (3 marks): Balanced judgment. While reclamation was historically the most effective for rapid growth, a shift toward "optimizing existing land" and "underground development" is now more critical for long-term resilience.