O Level Geography Practice Paper 4

Answer Key - Geography O-Level Practice Paper (Version 4)

PAPER 1

Question 1 (Fieldwork) (a) Hypothesis: "Residents have a stronger positive sense of place towards the heritage district than tourists do." (Accept any logical hypothesis linking sense of place to the location). [1] (b) Graph Suggestion: A grouped bar chart or a multi-line graph. [1] X-axis represents the three locations, Y-axis represents the attractiveness score. [1] Use a legend/different colors to distinguish the three locations. [1] (c) Calculation: Assign numerical values to the bipolar scale (e.g., Very Attractive = +2, Attractive = +1, Unattractive = -1, Very Unattractive = -2). [1] Multiply the frequency of each response by its weight and sum them to find the net score. [1] (d) Evaluation:

• Position: Partially reliable / Unreliable. [1]
• Evidence: Sample size of 60 (30 residents, 30 tourists) may be too small to represent the entire population of the district. [1]
• Explanation: Bipolar surveys are subjective; responses may be influenced by the time of day or the mood of the respondent. [1]
• Qualification: However, using both residents and tourists provides a comparative perspective, increasing the breadth of the data. [1]

Question 2 (Tourism) (a) Tourism System: A set of interacting components consisting of the tourist (source), the transport (linkage), and the destination (attraction). [2] (b) Multiplier Effect:

• Direct spending: Tourists spend money at the eco-resort for accommodation. [1]
• Indirect spending: The resort buys organic produce from local farmers. [1]
• Induced spending: Employees of the resort spend their wages at local markets. [1]
• Result: This creates a cycle of spending that increases the overall income and employment in the rural area. [1] (c) Evaluation (9 marks):
• Agree: Biodiversity provides essential ecosystem services (carbon sequestration, water regulation). Loss of rainforest is irreversible. Ecotourism depends on the existence of biodiversity to attract visitors. [3]
• Disagree/Qualify: Economic development provides immediate jobs and infrastructure for impoverished local communities. Without economic incentive, locals may turn to illegal logging/poaching. [3]
• Conclusion: A balanced approach is needed. Sustainable tourism allows for low-impact infrastructure that funds conservation while providing livelihoods. [3]

Question 3 (Climate) (a) Distinction: Mitigation addresses the cause of climate change (e.g., transitioning to solar energy to reduce $\text{CO}_2$ emissions). [2] Adaptation addresses the impact of climate change (e.g., building sea walls to protect against rising sea levels). [2] (b) Methane Mechanism: Methane is a potent greenhouse gas. [1] Short-wave solar radiation enters the atmosphere and warms the Earth. [1] The Earth re-emits this as long-wave infrared radiation. [1] Methane molecules absorb this long-wave radiation and re-radiate it back to the surface. [1] This traps more heat in the atmosphere, increasing global temperatures. [1] (c) Food Shortage Evaluation:

• Agree: Extreme weather (droughts/floods) destroys crops and reduces yields. [2]
• Disagree: Other causes include population growth exceeding production, political conflict disrupting supply chains, and poverty limiting access to food. [2]
• Conclusion: Climate change is a significant catalyst, but food shortage is a result of interconnected environmental and socio-political factors. [2]

PAPER 2

Question 4 (Thinking Geographically) (a) Sense of Place: The playground is a site of childhood memories. [1] These memories create an emotional attachment to the physical space. [1] This transforms the HDB estate from a mere residential area into a place of personal significance. [1] Consequently, the resident feels a sense of belonging and identity. [1] (b) Value Orientations: Anthropocentric view sees nature as a resource to be managed for human benefit. [1] Ecocentric view sees nature as having intrinsic value regardless of its utility to humans. [1] They differ in their priority: human needs vs. ecological preservation. [1]

Question 5 (Tectonics) (a) Instrument: Moment Magnitude Scale (MMS). [1] (b) Diagram & Process:

• Diagram: Show oceanic plate subducting under continental plate, label trench, subduction zone, magma chamber, and volcanic arc. [2]
• Process: Oceanic plate is denser and sinks. [1] Friction and melting of the subducting slab create magma. [1] Magma rises through the continental crust to form volcanoes. [1] (c) Vulnerability:
• Building Codes: Developing countries often lack strict seismic codes, leading to building collapse. [2]
• Governance: Poor emergency response and lack of disaster preparedness increase casualties. [2]
• Poverty: Lack of resources for rapid reconstruction and medical aid. [2]

Question 6 (Singapore) (a) Underground Reservoirs: Singapore has limited surface area for reservoirs. [1] By building underground, Singapore utilizes the space beneath the surface. [1] This allows for the capture of urban stormwater runoff that would otherwise flow into the sea. [1] It increases the total storage capacity without requiring more land. [1] This enhances water security. [1] (b) Evaluation (9 marks):

• Agree: Diversification (Local catchment, NEWater, Desalination, Imports) reduces reliance on any single source (e.g., Malaysia). NEWater creates a sustainable, closed-loop system. [3]
• Disagree/Qualify: Desalination is energy-intensive and expensive. Dependence on high-tech solutions makes the system vulnerable to power failures. [3]
• Conclusion: It is the most effective strategy because it addresses both supply-side scarcity and demand-side resilience through a multi-pronged approach. [3]