Cambridge IGCSE · Thinka 原創模擬試題

2025 Cambridge IGCSE Geography (0460) 模擬試題連答案詳解

Thinka Nov 2025 (V1) Cambridge International A Level-Style Mock — Geography (0460)

195 分285 分鐘2025

An original Thinka practice paper modelled on the structure and difficulty of the Nov 2025 (V1) Cambridge International A Level Geography (0460) paper. Not affiliated with or reproduced from Cambridge.

Paper 11 甲部

Answer exactly ONE question from this section. Consists of Question 1 (Population) and Question 2 (Settlements). Each features structured sub-parts and an extended case study essay.

7 題目 · 25 分

題目 1 · Structured Short Answer

2.5 分

A country has a birth rate of 38 per 1000 and a death rate of 14 per 1000. (a) Calculate the natural growth rate as a percentage. [1 mark] (b) Explain one reason why birth rates remain high in many developing countries. [1.5 marks]

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解題

(a) To find the natural growth rate: Natural Growth Rate = (Birth Rate - Death Rate) / 10. Thus, (38 - 14) / 10 = 24 / 10 = 2.4%. (b) In many developing countries, high infant mortality rates encourage families to have more children to ensure some survive to adulthood. Additionally, children are viewed as economic assets who can work on subsistence farms or provide care for parents in old age.

評分準則

(a) [1 mark] Award 1 mark for the correct calculation: 2.4% (or 2.4). (b) [1.5 marks] Award 1 mark for identifying a valid reason (e.g., high infant mortality, lack of contraception, cultural preference for large families, need for agricultural labor) and 0.5 marks for explaining how it keeps birth rates high (e.g., 'so parents have more children to ensure some survive to support them in old age').

題目 2 · Structured Short Answer

2.5 分

(a) Explain the relationship between the population size of an urban settlement and the threshold population of the services it can support. [1.5 marks] (b) Give one example of a low-order service and one example of a high-order service. [1 mark]

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解題

(a) Settlement size and service provision are directly related. A larger settlement has a large population which can meet the high threshold population (the minimum number of customers needed to make a service profitable) of high-order services. Small settlements lack this population and can only support low-order services with low threshold requirements. (b) Examples of low-order services include newsagents or primary schools. Examples of high-order services include specialist hospitals, international airports, or universities.

評分準則

(a) [1.5 marks] Award 1 mark for explaining that larger settlements have larger populations that meet the high threshold needed for specialized/high-order services, and 0.5 marks for contrasting this with smaller settlements or defining threshold population. (b) [1 mark] Award 0.5 marks for a correct low-order service and 0.5 marks for a correct high-order service. Reject vague answers like 'shop' or 'school' unless qualified.

題目 3 · Structured Short Answer

2.5 分

(a) Identify one environmental push factor that drives rural-to-urban migration in developing countries. [0.5 marks] (b) Explain how the sending of remittances benefits families remaining in the rural source area. [2 marks]

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解題

(a) An environmental push factor is natural drought or desertification, which leads to crop failure and starvation. (b) Remittances are cash transfers sent back by migrants to their home families. This money directly increases household income, allowing families to pay for school fees, buy modern farming machinery or fertilizers to improve crop yields, or access better medical treatment.

評分準則

(a) [0.5 marks] Award 0.5 marks for any valid environmental push factor (e.g., drought, flooding, soil erosion, volcanic eruptions). Reject human-induced/economic factors like low wages. (b) [2 marks] Award 1 mark for each distinct benefit explained (up to 2 marks) or 1 mark for identifying a benefit (e.g., paying for school) and 1 mark for developing the explanation of its positive impact (e.g., 'which leads to better educational attainment and higher-paying jobs in the future').

題目 4 · Structured Short Answer

2.5 分

As urban areas expand, they encroach on the surrounding countryside. (a) Define the term 'urban sprawl'. [1 mark] (b) Describe two environmental impacts of urban sprawl on the rural-urban fringe. [1.5 marks]

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解題

(a) Urban sprawl refers to the outward, uncontrolled spreading of a city's suburbs and housing into the rural-urban fringe or surrounding countryside. (b) Two environmental impacts include: 1. Loss of greenfield sites and natural habitats as agricultural land is paved over, leading to a loss of biodiversity. 2. Increased air pollution and carbon emissions due to the increased dependency on cars for long-distance commuting into the city center.

評分準則

(a) [1 mark] Award 1 mark for a complete definition mentioning the 'outward expansion/spreading of urban areas' into the 'rural-urban fringe/countryside/rural areas'. (b) [1.5 marks] Award 1 mark for the first valid environmental impact described (e.g., loss of wildlife habitats, loss of agricultural soil, increased air pollution from commuters) and 0.5 marks for a second valid environmental impact. Reject purely social or economic impacts like 'loss of agricultural jobs' or 'traffic congestion' unless clearly linked to environmental degradation.

題目 5 · Resource Interpretation

4 分

Study Fig. 1.1, which shows population data for four provinces of Country X.

Fig. 1.1:
- Province A: Area = 50,000 square kilometers, Population = 10,000,000
- Province B: Area = 120,000 square kilometers, Population = 1,200,000
- Province C: Area = 80,000 square kilometers, Population = 4,000,000
- Province D: Area = 10,000 square kilometers, Population = 5,000,000

(i) Calculate the population density of Province B. (1 mark)
(ii) Identify the most densely populated province in Fig. 1.1. (1 mark)
(iii) Suggest two physical factors that could explain why some provinces in Country X have a low population density. (2 marks)

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解題

(i) Population density of Province B = Population divided by Area = 1,200,000 / 120,000 = 10 people per square kilometer.
(ii) Province D is the most densely populated with 500 people per square kilometer (5,000,000 / 10,000).
(iii) Natural physical factors that deter settlement include steep, mountainous terrain which makes infrastructure construction difficult, and extreme climates (very dry or cold) which limit agricultural possibilities.

評分準則

(i) 1 mark for correct calculation: 10 (or 10 people/km2).
(ii) 1 mark for Province D.
(iii) 2 marks for any two valid physical factors: e.g., mountainous/rugged relief, extreme climate (arid/polar), poor/infertile soils, water scarcity, or dense forest/swamps (1 mark per factor).

題目 6 · Resource Interpretation

4 分

Study Fig. 2.1, which shows settlement hierarchy data for a region.

Fig. 2.1:
- City: Number of settlements = 2 | Average Population = 250,000 | Typical Services = Specialist Hospital, University, Cathedral
- Town: Number of settlements = 15 | Average Population = 20,000 | Typical Services = Secondary school, Supermarket, Bank
- Village: Number of settlements = 80 | Average Population = 1,500 | Typical Services = Primary school, Post office, General store
- Hamlet: Number of settlements = 300 | Average Population = 100 | Typical Services = None

(i) Describe the relationship shown in Fig. 2.1 between the number of settlements of a type and its average population size. (1 mark)
(ii) Identify one high-order service found only in cities from Fig. 2.1. (1 mark)
(iii) Explain why higher-order services, such as a specialist hospital, require a larger threshold population than lower-order services like a general store. (2 marks)

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解題

(i) There is an inverse/negative relationship: as the average population size of the settlement increases, the number of settlements of that type decreases (or vice versa).
(ii) Any one of: Specialist Hospital, University, or Cathedral.
(iii) High-order services are highly specialized, expensive to establish, and used infrequently by individuals. Therefore, they require a much larger threshold population (customer base) to cover operational expenses and ensure profitability compared to everyday, low-order services like a general store.

評分準則

(i) 1 mark for describing the inverse/negative relationship (e.g., as population increases, settlement quantity decreases).
(ii) 1 mark for identifying: Specialist Hospital / University / Cathedral.
(iii) 2 marks: 1 mark for recognizing that high-order services are specialized/costly/infrequently used, and 1 mark for explaining that they need a larger market/more customers to make a profit/survive economically.

題目 7 · case study

7 分

For a named urban area you have studied, explain how the challenges caused by rapid urban growth have been managed.

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解題

Example Case Study: Rio de Janeiro, Brazil

To manage the challenges of rapid urban growth and the development of informal settlements (favelas), various strategies have been implemented:

1. Housing and Infrastructure (The Favela-Bairro Project):
In favelas such as Rocinha, the government has implemented 'site and service' schemes. Instead of clearing the slums, they have paved roads, installed formal sewage systems, and provided access to clean piped water and electricity. This has reduced the spread of water-borne diseases like cholera and made the areas safer from landslides by building retaining walls on steep hillsides.

2. Transport Upgrades:
To improve connectivity and employment opportunities, a cable car system was built in the Complexo do Alemão favela group. This allowed residents to travel to the central commercial districts quickly and cheaply, reducing commute times from over an hour to just 16 minutes, thereby integrating the informal settlements into the formal economy.

3. Self-Help Schemes:
Residents are provided with free or subsidized building materials (such as bricks, timber, and cement) to upgrade their wooden shacks into permanent, safer brick structures. This improves living conditions and reduces the high risk of rapid fire spread through congested housing.

評分準則

Level 1 (1-3 marks): Simple statements explaining general management strategies without development.
- They built better houses.
- They improved transport.
- They gave people clean water.

Level 2 (4-6 marks): Developed statements that explain *how* these strategies manage the specific challenges of rapid growth.
- In favelas, the government implemented the Favela-Bairro project where streets were paved and water pipes installed to reduce water-borne diseases (4 marks).
- Self-help schemes provide residents with building materials like concrete and bricks so they can replace dangerous wooden shacks with permanent structures that are fire-resistant (5 marks).
- Cable car systems were built over hilly slums to connect residents directly to the subway and central business districts, improving access to employment (6 marks).

Level 3 (7 marks): Comprehensive, well-developed points with specific, accurate place-specific references (e.g., naming specific settlements like Rocinha or Complexo do Alemão and detailing specific projects).

Paper 11 乙部

Answer exactly ONE question from this section. Consists of Question 3 (Coasts) and Question 4 (Tectonic Hazards). Includes diagrams, visual resource prompts, and an analytical case study.

7 題目 · 25 分

題目 1 · Structured Short Answer

2.5 分

Identify the coastal landform formed by longshore drift depositing sediment across a bay, and state two conditions necessary for its development.

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解題

A spit is formed when longshore drift moves material along a coastline. When there is a sudden change in the direction of the coastline (e.g., an estuary or bay), the sediment continues to be deposited in the same direction, extending out into the sea. Conditions include: 1) a dominant/prevailing wind approaching the coast at an angle, 2) a large supply of shingle/sand, and 3) a shallow, sheltered sea area behind the spit to allow deposition.

評分準則

0.5 marks for identifying the landform (Spit). 1 mark for each of the two correct conditions listed (maximum 2 marks for conditions). Total = 2.5 marks.

題目 2 · Structured Short Answer

2.5 分

In a study of coastal erosion at Cliffside Bay, the rate of cliff retreat was measured at 1.8 metres per year over a 5-year period. Explain two human activities that could accelerate this rate of cliff recession.

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解題

Human activities can accelerate cliff recession by increasing load/mass on the cliff top, introducing excess water into the cliff face (e.g., from garden watering or leaking pipes), or removing natural protection at the base.

評分準則

0.5 marks for identifying an activity (e.g., building on cliff tops) and 1 mark for each of the two well-explained activities that accelerate erosion (up to 2 marks). Total = 2.5 marks.

題目 3 · Structured Short Answer

2.5 分

Contrast the characteristics of shield volcanoes and composite volcanoes by comparing their shape and the viscosity of the lava they erupt.

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解題

Shield volcanoes are wide and flat-shaped because their lava is basic (basaltic), which has low silica content, low viscosity, and flows easily over long distances before cooling. Composite volcanoes are conical and steep because their lava is acidic (andesitic/rhyolitic), has high silica content, high viscosity, and cools quickly near the vent, building up steep layers of ash and lava.

評分準則

0.5 marks for general comparison setup. 1 mark for contrasting shapes (gentle vs steep). 1 mark for contrasting lava viscosity (low/runny vs high/thick). Total = 2.5 marks.

題目 4 · Structured Short Answer

2.5 分

Explain how the movement of tectonic plates at a destructive (convergent) plate boundary leads to the occurrence of earthquakes.

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解題

Destructive plate margins involve an oceanic plate colliding with and subducting under a continental plate. This movement is not smooth due to friction, causing plates to stick. Tremendous tension builds up at the subduction zone (Benioff zone). When the rock finally fractures or slips, a massive amount of stored elastic energy is released instantly as seismic waves, resulting in an earthquake.

評分準則

0.5 marks for mentioning subduction/collision of plates. 1 mark for explaining the friction/locking and pressure buildup. 1 mark for explaining the sudden release of energy/is seismic waves when the rock slips/breaks. Total = 2.5 marks.

題目 5 · Resource Interpretation

4 分

Study Fig. 3.1, which is a diagram showing a coastal spit. Explain how longshore drift and deposition work together to form a spit such as the one shown in Fig. 3.1.

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解題

Longshore drift transport of sediment occurs when waves approach the shoreline at an angle due to the prevailing wind. The swash carries sand and shingle up the beach at an angle, while the backwash carries it directly back down the beach at a right angle under gravity. This results in a zig-zag movement of material along the coast. When the coast changes direction (such as at a river estuary), the waves lose their energy in the deeper, calmer, or sheltered water. As energy drops, deposition occurs. Continued deposition extends a ridge of sand and shingle across the river mouth or bay, creating a spit. Secondary wind directions can refract waves and curve the tip of the spit, creating a recurved end.

評分準則

Award up to 4 marks for valid explanation points. [1 mark] Explaining that prevailing wind drives waves to approach the beach at an angle, leading to swash moving sediment up the beach at an angle. [1 mark] Explaining that backwash retreats perpendicular (at 90 degrees) to the shoreline under gravity, moving material in a zig-zag path (longshore drift). [1 mark] Explaining that a change in coastline shape (estuary/bay) causes waves to lose energy and deposit sediment. [1 mark] Explaining that continuous deposition builds a ridge of sand/shingle extending into the sea. [1 mark] Reference to wave refraction or secondary wind directions curving the tip of the spit.

題目 6 · Resource Interpretation

4 分

Study Fig. 4.1, which is a cross-section diagram of a destructive (convergent) plate boundary. Explain how tectonic processes at this boundary lead to the formation of volcanoes.

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解題

At a destructive plate boundary, convection currents cause an oceanic plate and a continental plate to collide. The denser oceanic plate is forced downward beneath the lighter continental plate in a process called subduction. As the subducting plate descends into the mantle (specifically the asthenosphere), high pressure, geothermal heat, and intense friction cause the rock to melt into magma. Because magma is hot and less dense than the surrounding solid crust, it rises upward through cracks, faults, and weaknesses in the continental crust. When it reaches the surface, it erupts as lava and ash, which build up in layers over time to construct a steep-sided composite volcano.

評分準則

Award up to 4 marks for valid explanation points. [1 mark] Stating that the plates collide/converge and the denser oceanic plate is subducted/sinks beneath the continental plate. [1 mark] Explaining that the subducting crust melts into magma due to heat, friction, or pressure in the mantle/subduction zone. [1 mark] Explaining that magma rises because it is less dense/buoyant than surrounding rock, moving through cracks, faults, or fissures. [1 mark] Explaining that magma reaches the surface and erupts, cooling to build up layers of lava and ash to form a volcano.

題目 7 · extended_writing

7 分

For a named area of coastline you have studied, explain how coastal erosion is managed.

Name of coastal area: ....................................................................

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解題

Example Case Study: The Holderness Coast, Yorkshire, UK

The Holderness Coast is one of Europe's fastest-eroding coastlines, losing an average of 1.8 metres of land per year due to easily eroded soft boulder clay cliffs and powerful destructive waves from the North Sea.

To manage this erosion, several strategies have been implemented:
1. At Mappleton, two rock groynes constructed from blocks of Scandinavian granite were built in 1991 at a cost of £2 million. These groynes trap sand carried by longshore drift, building up a wider beach which absorbs the energy of the waves and prevents them from reaching the base of the boulder clay cliffs. This has successfully protected the village and the critical B1242 coastal road.
2. In addition, a rock revetment (rip-rap) consisting of large granite boulders was placed at the foot of the cliffs at Mappleton to absorb and dissipate wave energy directly, reducing the rate of cliff undercutting.
3. At Hornsea, a concrete sea wall has been built to act as a physical barrier reflecting wave energy back out to sea, protecting the high-value seaside resort, its promenade, and local businesses.

However, these management strategies have caused terminal groyne syndrome further south. At Great Cowden, the lack of sediment transport due to the groynes at Mappleton has starved the beaches of sand, leading to accelerated erosion of agricultural land and caravan parks.

評分準則

Level 1 (1 to 3 marks):
- Simple, generalized statements explaining how coastal management works without specific location details.
- e.g., 'Sea walls are built to stop waves hitting the cliffs.' or 'Groynes are put on the beach to trap sand.'
- Max 3 marks.

Level 2 (4 to 6 marks):
- Developed explanations of how specific management strategies work, with some reference to a named coastal area.
- e.g., 'At Holderness, rock groynes were built to trap sand carried by longshore drift. This creates a wider beach which absorbs wave energy and protects the cliffs.' or 'A concrete sea wall was built at Hornsea to reflect wave energy back to the sea, protecting the town from collapsing into the sea.'
- Max 5 marks if no named/located example or if the example is completely inappropriate. Max 6 marks for well-developed points with a named example.

Level 3 (7 marks):
- Comprehensive, well-developed explanations of at least two management methods.
- Must include precise, place-specific details (e.g., specific town names like Mappleton or Hornsea, cost figures like £2 million, or named roads like the B1242) for the chosen case study.

Paper 11 部分 C

Answer exactly ONE question from this section. Consists of Question 5 (Industry/Environment) and Question 6 (Agriculture). Covers economic development themes and requires a case study.

8 題目 · 32 分

題目 1 · Structured Short Answer

2.5 分

Identify and explain two human inputs required for intensive wet rice cultivation.

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解題

Intensive wet rice cultivation is highly labour-intensive, requiring a large workforce for tasks like terracing hillsides, transplanting delicate seedlings from nurseries to flooded fields, manual weeding, and harvesting. Additionally, human inputs such as capital are vital to purchase high-yielding variety (HYV) seeds, chemical fertilizers, and pesticides to maximize output from small plots of land.

評分準則

1 mark for each of two correctly identified human inputs (such as manual labour, capital, fertilizers/pesticides, high-yield seeds) [Max 2 marks]. 0.5 marks for a clear explanation of how one of these inputs is applied to facilitate production (e.g., labor is needed to transplant seedlings into flooded padi fields by hand).

題目 2 · Structured Short Answer

2.5 分

Explain how the presence of major universities influences the location of high-technology industries.

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解題

High-technology industries rely heavily on highly skilled, specialized labor, such as software engineers and researchers, which universities supply directly. Furthermore, close proximity to these academic institutions allows for joint research and development (R&D) projects, direct technology transfers, and the creation of university spin-off companies that locate nearby.

評分準則

1 mark for identifying the supply of highly skilled graduates/labour. 1 mark for identifying opportunities for joint research, development, and innovation sharing. 0.5 marks for an elaboration (e.g., explaining how this proximity reduces recruitment costs or facilitates rapid startup/spin-off growth).

題目 3 · Structured Short Answer

2.5 分

Explain two ways in which overcultivation leads to the physical and chemical degradation of agricultural soil.

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解題

Overcultivation occurs when crops are grown continuously without leaving the land fallow. This physically degrades the soil because constant tilling breaks down soil aggregates, making the topsoil loose and highly vulnerable to erosion by wind and rain. Chemically, it leads to nutrient depletion as crops repeatedly extract minerals (like nitrogen, phosphorus, and potassium) without natural replenishment, leaving the soil infertile.

評分準則

1 mark for explaining nutrient depletion (continuous cropping exhausts soil minerals). 1 mark for explaining physical structural damage/erosion vulnerability (constant tillage breaks soil structure, making it easily washed or blown away). 0.5 marks for explaining the overall consequence, such as desertification or complete loss of agricultural productivity.

題目 4 · Structured Short Answer

2.5 分

Explain how the rapid development of coastal tourism infrastructure can degrade marine ecosystems.

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解題

The construction of hotels and marinas often involves land reclamation and dredging, which physically destroys coastal wetlands and smothers coral reefs with sediment. Additionally, the rapid influx of tourists often overwhelms local sewage systems, leading to the discharge of untreated wastewater into the sea, causing eutrophication, algal blooms, and the death of marine life.

評分準則

1 mark for explaining physical destruction/dredging/sedimentation from construction of hotels/marinas. 1 mark for explaining chemical pollution/eutrophication from untreated sewage or tourist waste. 0.5 marks for describing a specific impact on marine biodiversity (e.g., coral bleaching or loss of fish habitats).

題目 5 · free-text

4 分

Study Fig. 1.1, which lists the locational factors of NovaTech, a high-tech science park firm: Proximity to research university (40%), Proximity to international airport (30%), Agglomeration benefits (15%), Land costs (10%), Low-cost labor (5%). Using Fig. 1.1, explain why high-tech firms value proximity to research universities highly, but place very low importance on low-cost labor.

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解題

1. High-tech firms require highly skilled, specialized labor such as software engineers and scientists, who are recruited directly from nearby universities. 2. Proximity allows for collaborative research, sharing of ideas, and university-firm spin-offs. 3. Low-cost labor is of low importance because high-tech production is highly automated, using advanced computer-aided manufacturing. 4. High-tech companies focus on research and development (R&D) and high-value components rather than mass assembly of cheap goods.

評分準則

Award up to 4 marks total. 1 mark for each valid explanation point (maximum of 2 marks per factor discussed): - Nearness to universities provides a steady supply of highly skilled graduates or researchers (1 mark) - Allows for partnership, joint research, or transfer of technology and ideas (1 mark) - Low-cost labor is not prioritized because the work is highly specialized and relies on cognitive skill rather than manual dexterity (1 mark) - Modern high-tech manufacturing is capital-intensive or automated with robotics, reducing the need for cheap manual labor (1 mark).

題目 6 · free-text

4 分

Study Fig. 2.1, which shows the inputs, processes, and outputs of an intensive wet-rice commercial farm in Southeast Asia: Inputs (HYV seeds, chemical fertilizers, irrigation channels, small tractors); Processes (Sowing, weeding, mechanical harvesting); Outputs (Rice for market, straw, cash profit). Using Fig. 2.1 and your own knowledge, identify two human inputs and explain how each input helps to increase the crop yield of this agricultural system.

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解題

From Fig. 2.1, candidates can identify human inputs like HYV seeds, chemical fertilizers, or small tractors. 1. High Yielding Varieties (HYV seeds) are selected and bred to produce larger grain heads, resist localized crop diseases, and have shorter growing cycles, allowing for double or triple cropping. 2. Chemical fertilizers supply crucial nutrients like nitrogen, phosphorus, and potassium directly to the plants, ensuring rapid, healthy growth even in intensively cropped soils that would otherwise suffer from nutrient depletion.

評分準則

Award 1 mark for each correctly identified human input from Fig. 2.1 (maximum of 2 marks). Accept: HYV seeds, chemical fertilizers, or tractors. Award 1 mark for each correct explanation of how the identified input increases yield (maximum of 2 marks). Examples: - HYV seeds: designed to produce more grain per plant or shorten growing cycle to allow multi-cropping (1 mark) - Chemical fertilizers: enrich the soil with nutrients to prevent nutrient exhaustion and boost crop growth rates (1 mark) - Tractors/machinery: speed up sowing or harvesting, reducing crop damage and ensuring timely operations (1 mark). No double-crediting if the same explanation is used for different inputs.

題目 7 · Case Study

7 分

For a named area you have studied where manufacturing or processing industry has developed, explain how this industry has caused damage to the local natural environment. State the name of the area you have studied.

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解題

Example Case Study: Manufacturing in the Pearl River Delta (PRD), China

Industrial plants, particularly textile and electronics factories in cities like Dongguan, have discharged untreated heavy metals (such as lead and cadmium) and chemical effluents directly into the Pearl River and its tributaries. This has severely degraded water quality, causing eutrophication and destroying aquatic habitats. Furthermore, coal-fired power plants supporting these industries emit massive amounts of sulfur dioxide and nitrogen oxides. This leads to severe smog episodes and acid rain, which damages surrounding agricultural land and forest ecosystems. Additionally, the rapid physical expansion of factory complexes has caused widespread deforestation, leading to soil erosion and loss of biodiversity in formerly rural parts of Guangdong province.

評分準則

Level 1 (1-3 marks): Simple statements describing general environmental impacts of industry (e.g., factories dump waste into rivers; smoke pollutes the air).

Level 2 (4-6 marks): Developed explanations showing how the industrial activity causes specific damage (e.g., toxic chemical effluents from dye factories contaminate river systems, killing fish and bioaccumulating in the food chain; sulfur dioxide emissions cause acid rain which lowers soil pH and kills trees). Max 5 marks if no appropriate case study is named.

Level 3 (7 marks): At least two well-developed explanations with precise, located case study details (e.g., named rivers like the Pearl River, specific cities like Dongguan, or precise pollutants).

題目 8 · Case Study

7 分

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解題

Example Case Study: Manufacturing in the Pearl River Delta (PRD), China

評分準則

Level 1 (1-3 marks): Simple statements describing general environmental impacts of industry (e.g., factories dump waste into rivers; smoke pollutes the air).

Paper 21 必答 Skills

Answer ALL questions. Question 1 targets rigorous map extraction skills. Questions 2-6 test systematic topical units with quantitative tools.

6 題目 · 60 分

題目 1 · Map Extraction Analysis

20 分

Study the map extract of the Abermouth region (Scale 1:50,000, contour interval 10 metres). Grid lines are spaced 1 km (2 cm on the map) apart.

**Map Key & Details:**
* **Church with tower:** Black square with a cross
* **School:** Black rectangle labelled 'Sch'
* **Lighthouse:** Red star with radiating lines
* **Triangulation pillar:** Blue triangle with elevation (e.g., ┳ 185)
* **Cemetery:** Labelled 'Cem'
* **Roads:** Main A-road (thick red line); Secondary B-road (orange line); Footpath (dashed black line)
* **Vegetation:** Coniferous forest (shaded green with pine tree symbols); Orchard (green circles)

Answer the following questions:

**(a) Feature Identification and Location**
(i) Identify the feature found at the 6-figure grid reference **348782**. [1]
(ii) State the 4-figure grid reference of the square containing the lighthouse on the headland. [1]
(iii) State the feature located at the 6-figure grid reference **391823**. [1]
(iv) Identify the class of road that runs across the map from grid square 3275 to 4281. [1]

**(b) River and Valley Analysis**
The Glen River flows through the map extract from the west towards the sea in the east. Describe the physical features of the Glen River and its valley between grid line 34 and grid line 39. [4]

**(c) Distance, Direction, and Bearing**
(i) Calculate the straight-line distance, in metres, between the church in grid square **3376** (located at 334762) and the school in grid square **3679** (located at 364792). Show your working. [2]
(ii) State the compass direction and the grid bearing, in degrees, from the church at 334762 to the school at 364792. [2]

**(d) Settlement Distribution and Site Factors**
Identify the distribution of the settlement of Abermouth in grid squares **3980, 4080, 3981, and 4081**, and suggest **two** reasons why this site was chosen for the growth of the town. [4]

**(e) Comparative Map Analysis**
Compare the relief and the land use/vegetation of grid square **3583** with grid square **4176**. [4]

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解題

**(a) Feature Identification and Location**
(i) At 348782, the blue triangle indicates a **triangulation pillar** (or spot height of 185m).
(ii) The lighthouse is located in grid square **4184**.
(iii) At 391823, the text label 'Cem' denotes a **cemetery**.
(iv) The thick red line represents a **Main A-road**.

**(b) River and Valley Analysis**
* The Glen River exhibits a winding/meandering path flowing generally west to east / north-east.
* Tributary streams feed into the river from the steep northern and southern slopes.
* The valley is highly asymmetrical and changes downstream: in the west (grid line 34), it is a steep-sided, narrow V-shaped valley (indicated by close contours). Towards the east (grid line 39), the valley floor broadens out into a flat floodplain with widely spaced contours.
* An island (eyot) is visible in the channel within grid square 3780.

**(c) Distance, Direction, and Bearing**
(i) The church is at 33.4 Easting, 76.2 Northing. The school is at 36.4 Easting, 79.2 Northing.
Using the Pythagorean distance on the grid system:
$\Delta E = 36.4 - 33.4 = 3.0\text{ km} = 3000\text{ m}$
$\Delta N = 79.2 - 76.2 = 3.0\text{ km} = 3000\text{ m}$
$\text{Distance} = \sqrt{3000^2 + 3000^2} = \sqrt{18,000,000} \approx 4242.6\text{ m}$.
On a standard 1:50,000 map, this measures approximately 8.5 cm, translating to **4240 m** (accepting a normal map error tolerance range of **4100 m to 4300 m**).
(ii) Direction: Since the change in Eastings and Northings is equal, the direction is **North-East (NE)**. The grid bearing from North is exactly **045 degrees** (accepting $43^\circ$ to $47^\circ$).

**(d) Settlement Distribution and Site Factors**
* **Distribution:** The settlement is concentrated primarily along the coastal margins on the flat, low-lying land surrounding the mouth of the Glen River estuary. It spans both the north and south banks, though the built-up area is denser and more extensive on the northern side. It also shows a linear pattern spreading along the main A-road and railway line.
* **Reasons for growth (Site Factors):**
1. The flat land (slopes under 10m) makes structural and infrastructure development easy and cost-effective.
2. The estuary provides a natural deepwater sheltered harbor, key for maritime trade, fishing, or transport.
3. The river provides an abundant source of fresh water for domestic and early industrial use.
4. It serves as a natural bridging point where road and rail routes converge to cross the estuary.

**(e) Comparative Map Analysis**
* **Relief:** Grid square 3583 features highly elevated, steep slopes rising from 120m to over 240m (contours packed close together). In contrast, grid square 4176 is extremely low-lying (all below 20m) and flat or very gently sloping (contours are sparse or absent).
* **Land Use/Vegetation:** 3583 is entirely covered by coniferous forest, has no settlements or main roads, and is only crossed by a footpath. Grid square 4176 contains mixed farmland/orchards, several scattered rural buildings, and is well-served by a secondary B-road.

評分準則

**(a) Feature Identification and Location** [Total: 4 marks]
(i) Triangulation pillar / spot height of 185m [1]
(ii) 4184 [1]
(iii) Cemetery [1]
(iv) Main A-road / A-road [1]

**(b) River and Valley Analysis** [Total: 4 marks]
Award 1 mark for each valid physical descriptor (up to 4):
* Flows from west to east / north-east [1]
* Meandering / winding / sinuous channel [1]
* Presence of tributary streams [1]
* Valley is narrow / V-shaped / steep-sided in the west [1]
* Valley is wide / flat / has a floodplain in the east [1]
* Presence of an island / eyot in the channel (in 3780) [1]

**(c) Distance, Direction, and Bearing** [Total: 4 marks]
(i) 4240m (Accept range 4100m to 4300m) [2]
*Award 1 mark for correct measurement in cm (8.4cm to 8.6cm) or for correct distance in kilometres (4.1km to 4.3km) but failing to state in metres.*
(ii) Compass direction: North-East / NE [1]
Grid bearing: 045 degrees (Accept 43 to 47 degrees) [1]
*Note: Do not accept 45 without units/degrees or leading zero standard format, but allow full marks if 045 is clearly stated.*

**(d) Settlement Distribution and Site Factors** [Total: 4 marks]
*Distribution (Max 2 marks):*
* Clustered / concentrated around the river estuary/mouth [1]
* Located on flat/low-lying coastal land [1]
* Built on both banks (north and south) of the river [1]
* More extensive / larger density on the north bank [1]
* Linear sprawl along transport routes [1]
*Site Factors (Max 2 marks):*
* Flat land offers easy construction [1]
* Estuary provides a sheltered harbor / port site [1]
* River provides a reliable freshwater supply [1]
* Bridging point of the river attracts transport routes [1]

**(e) Comparative Map Analysis** [Total: 4 marks]
Compare Relief (Max 2 marks, must compare both squares to award a mark):
* 3583 has steep slopes / high land whereas 4176 is flat / low-lying [1]
* 3583 reaches heights over 240m whereas 4176 is below 20m [1]
Compare Land Use/Vegetation (Max 2 marks, must compare both squares to award a mark):
* 3583 is covered by coniferous forest whereas 4176 has orchards / agricultural land [1]
* 3583 has no roads / buildings (only a footpath) whereas 4176 has a secondary B-road / scattered houses [1]

題目 2 · Structured

8 分

Study the imaginary map extract of the Glenford district (Scale 1:50,000).
(a) Give the 6-figure grid reference of the post office (PO) in Glenford village. [1]
(b) Calculate the straight-line distance in kilometres from the bridge at grid reference 421783 to the church tower at 443798. [2]
(c) What is the compass direction and the precise bearing from the bridge (421783) to the church tower (443798)? [2]
(d) Describe three physical features of the River Glenford and its valley in grid square 4279. [3]

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解題

Step-by-step resolution:
(a) Locate grid square 4279. Locate the 'PO' symbol. The easting value starts at 42 and is 4 tenths across (424). The northing value starts at 79 and is 2 tenths up (792). Combining these gives 424792.
(b) On a 1:50,000 scale map, 1 cm represents 0.5 km. The measured distance on the map between the two grid points is 5.4 cm. Multiply the map distance by the scale factor: $ 5.4 \times 0.5 = 2.7 $ km.
(c) Set the center of a protractor at the bridge (421783) with 0 degrees aligned to Grid North. Measuring clockwise to the church tower (443798) yields a bearing of 82 degrees. The corresponding compass direction is East-Northeast (ENE).
(d) Look at grid square 4279. The contours are closely spaced on both sides of the river, indicating steep valley slopes. The river line curves significantly, showing a meandering channel. The wider spacing of contours immediately adjacent to the inside bend of the river indicates a flat floodplain area.

評分準則

(a) 1 mark for correct grid reference: 424792 (Accept 423791 to 425793).
(b) 1 mark for correct map measurement of 5.4 cm (Accept 5.2 to 5.6 cm) or correct conversion method. 1 mark for correct final distance: 2.7 km (Accept 2.6 to 2.8 km).
(c) 1 mark for correct compass direction: ENE or East-Northeast (Accept East). 1 mark for correct bearing: 082 degrees (Accept 080 to 084 degrees).
(d) 3 marks total (1 mark per valid descriptive point of physical features):
- Steep valley sides / close contour lines [1]
- Meandering / winding river channel [1]
- Flat valley floor / floodplain on the inner bend [1]
- River flows towards the east/northeast [1]

題目 3 · Structured

8 分

Study the beach sediment data collected at four sites along a spit from the mainland (Site 1) to the spit recurved end (Site 4).
Site 1: Mean sediment diameter = 24mm, Beach slope angle = 9 degrees.
Site 2: Mean sediment diameter = 14mm, Beach slope angle = 6 degrees.
Site 3: Mean sediment diameter = 8mm, Beach slope angle = 4 degrees.
Site 4: Mean sediment diameter = 2mm, Beach slope angle = 2 degrees.

(a) Describe the relationship between the distance from the mainland and the mean sediment diameter along the spit. Use data to support your answer. [2]
(b) Suggest reasons for the change in sediment diameter along the spit described in (a). [3]
(c) Using the data provided, describe and explain the relationship between mean sediment diameter and the beach slope angle. [3]

查看答案詳解

解題

Step-by-step resolution:
(a) Compare the sites in order from 1 to 4 (increasing distance). Sediment sizes decrease from 24mm to 2mm. This is an inverse/negative relationship.
(b) Longshore drift transports material down-drift. Energy decreases along the spit, meaning coarser material is deposited near the source (mainland) and finer material is transported further. Continuous attrition reduces particle size during transport.
(c) Compare the two variables directly. Site 1 (24mm, 9 deg) vs Site 4 (2mm, 2 deg). Larger sediment allows more percolation, reducing backwash and leading to a steeper beach profile. Smaller sediment (sand) packs tightly, reducing percolation and allowing a stronger backwash to flatten the beach slope.

評分準則

(a) 2 marks:
- Identify negative/inverse relationship (as distance increases, sediment diameter decreases) [1]
- Support with data (e.g., from 24mm at Site 1 to 2mm at Site 4) [1]
(b) 3 marks:
- Longshore drift processes transport sediment from source/mainland [1]
- Loss of wave energy along the spit leads to selective deposition / larger particles deposited first [1]
- Attrition / erosion of particles during transport makes them smaller/rounder [1]
(c) 3 marks:
- Identify positive relationship (coarser sediment corresponds to steeper beach slopes) [1]
- Quote data from two sites to illustrate (e.g., Site 1 with 24mm and 9 degrees vs Site 4 with 2mm and 2 degrees) [1]
- Explanation: larger sediment leads to higher percolation, reducing backwash and retaining a steep gradient [1]

題目 4 · Structured

8 分

Students measured weather conditions around their school building on a windy winter day.
Site A (Open field): Dry Bulb = 14°C, Wet Bulb = 10°C.
Site B (Leeward side of school): Dry Bulb = 15°C, Wet Bulb = 13°C.

Relative Humidity (%) Table:
Dry Bulb Temp | Depression of Wet Bulb (difference between dry and wet bulb)
- | 1°C | 2°C | 3°C | 4°C | 5°C
14°C | 90% | 80% | 70% | 60% | 50%
15°C | 91% | 82% | 72% | 63% | 54%

(a) Determine the relative humidity at:
(i) Site A [1]
(ii) Site B [1]
(b) Describe and explain one difference in microclimate (temperature or wind speed) expected between Site A (open field) and Site B (leeward side of the main school building). [3]
(c) Suggest three ways students can ensure their weather instrument measurements are accurate and reliable during fieldwork. [3]

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解題

Step-by-step resolution:
(a)(i) Site A: Dry bulb = 14°C. Wet bulb = 10°C. Depression of wet bulb = $ 14 - 10 = 4 $°C. Look up 14°C dry bulb and 4°C depression on the table. The value is 60%.
(a)(ii) Site B: Dry bulb = 15°C. Wet bulb = 13°C. Depression = $ 15 - 13 = 2 $°C. Look up 15°C dry bulb and 2°C depression. The value is 82%.
(b) The main building acts as an obstacle. At Site B (leeward side), the building blocks incoming wind, creating a wind shadow with significantly lower wind speeds than the open field (Site A).
(c) Standard fieldwork reliability techniques: repeating measurements to find anomalies, ensuring proper instrument calibration, keeping thermometers out of direct sunlight (using a Stevenson screen or artificial shade) so they measure air temperature, not solar radiation.

評分準則

(a)(i) 1 mark: 60%
(a)(ii) 1 mark: 82%
(b) 3 marks:
- Identify difference: wind speed is lower / temperature is higher at Site B than Site A [1]
- Reason for wind speed: building acts as a physical barrier / creates wind shadow / shelters Site B [1]
- Reason for temperature: shelter reduces wind-chill / concrete surfaces absorb and radiate heat (thermal mass) [1]
(c) 3 marks (1 mark per valid point):
- Take readings at the same time at both sites to ensure fair comparison [1]
- Repeat measurements three times and calculate a mean [1]
- Ensure the thermometer bulb is dry before starting and shaded from direct sunlight [1]
- Hold anemometers at arm's length to prevent the body from blocking wind [1]

題目 5 · Structured

8 分

Study the table below showing demographic data for Country X in 1970 and 2020.
Year | Birth Rate (per 1000) | Death Rate (per 1000) | Infant Mortality Rate (per 1000 live births)
1970 | 44 | 18 | 95
2020 | 14 | 6 | 12

(a) Calculate the natural population increase rate (as a percentage) for Country X in:
(i) 1970 [1]
(ii) 2020 [1]
(b) Describe the changes in birth rate, death rate, and infant mortality rate in Country X between 1970 and 2020. Use data to support your answer. [3]
(c) Suggest three reasons for the dramatic decline in infant mortality rate in Country X during this 50-year period. [3]

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解題

Step-by-step resolution:
(a)(i) Natural Increase (NI) per 1000 = Birth Rate - Death Rate = $ 44 - 18 = 26 $ per 1000. As a percentage, divide by 10: $ 2.6\% $.
(a)(ii) NI per 1000 for 2020 = $ 14 - 6 = 8 $ per 1000. As a percentage: $ 0.8\% $.
(b) Compare all three indicators across 1970 and 2020. Highlight that all decreased, and use quantitative differences to secure full marks (e.g., BR decreased by 30/1000, DR fell to 6/1000, IMR dropped from 95 to 12).
(c) Focus on reasons for the decline in infant mortality: medical advances (vaccines against childhood diseases, antibiotics), sanitation (prevents waterborne cholera/diarrhea which kills infants), better pre-natal and post-natal care, improved nutrition for mothers and infants.

評分準則

(a)(i) 1 mark: 2.6% (must show '%' or work: $ (44-18)/10 $)
(a)(ii) 1 mark: 0.8%
(b) 3 marks:
- General trend: all three indicators decreased [1]
- Birth rate fell significantly (by 30 per 1000 or from 44 to 14) [1]
- Death rate decreased (by 12 per 1000 or from 18 to 6) [1]
- Infant mortality decreased sharply (by 83 per 1000 or from 95 to 12) [1]
(Note: Max 2 marks if no data/statistics are used to support the description)
(c) 3 marks (1 mark per valid reason):
- Improved healthcare / vaccination programmes against childhood diseases (e.g., measles, polio) [1]
- Access to clean, safe drinking water / improved sanitation reduces waterborne disease [1]
- Better prenatal/postnatal healthcare or educated midwives [1]
- Improved nutrition for babies and mothers [1]

題目 6 · Structured

8 分

Study the data below showing the location factors and transport costs for a heavy manufacturing steelworks.
Raw Material Source | Distance to Inland Site (km) | Distance to Coastal Site (km)
Iron Ore (Imported) | 450 | 0 (Port location)
Coal (Domestic) | 50 | 400

Transport costs:
- Rail transport of bulk raw materials: $0.10 per tonne per km
- Shipping/Sea transport: $0.02 per tonne per km

(a) A steel factory requires 2 tonnes of imported iron ore for every 1 tonne of domestic coal.
(i) Calculate the transport cost to move 2 tonnes of iron ore and 1 tonne of coal to the Inland Site. Show your working. [2]
(ii) Calculate the transport cost to move 2 tonnes of iron ore and 1 tonne of coal to the Coastal Site. Show your working. [2]
(b) Based on your calculations and geographical knowledge, explain why modern steelworks are increasingly located on coastal sites. [4]

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解題

Step-by-step resolution:
(a)(i) Inland Site transport costs:
- Iron ore: 2 tonnes transported 450 km = $ 2 \times 450 \times 0.10 = 90.00 $ dollars.
- Coal: 1 tonne transported 50 km = $ 1 \times 50 \times 0.10 = 5.00 $ dollars.
- Total cost = $ 90 + 5 = 95.00 $ dollars.

(a)(ii) Coastal Site transport costs:
- Iron ore: 0 km (at port) = $ 0.00 $ dollars.
- Coal: 1 tonne transported 400 km = $ 1 \times 400 \times 0.10 = 40.00 $ dollars.
- Total cost = $ 0 + 40 = 40.00 $ dollars.

(b) Modern steelworks rely heavily on imported, high-grade iron ore from global sources. Because iron ore is used in greater quantities than coal (2:1 ratio), locating at the coast eliminates the expensive overland rail transport of iron ore. Coastal sites also allow the use of bulk carriers (economies of scale) and facilitate the direct export of the finished steel.

評分準則

(a)(i) 2 marks:
- Show working: $ (2 \times 450 \times 0.10) + (1 \times 50 \times 0.10) $ [1]
- Correct total: $95.00 [1]
(a)(ii) 2 marks:
- Show working: $ (2 \times 0) + (1 \times 400 \times 0.10) $ [1]
- Correct total: $40.00 [1]
(b) 4 marks (1 mark per valid point):
- Coastal sites minimize transport costs for the heaviest raw material (iron ore) [1]
- Eliminates double-handling of imported materials [1]
- Allows the use of large bulk carrier ships which offer economies of scale / cheaper transport per tonne [1]
- Depletion of domestic iron ore reserves has forced reliance on imports, making ports more logical [1]
- Easier export of bulky finished steel to international markets [1]

Paper 41 Alternative to Coursework

Answer ALL questions. Question 1 focuses on urban and socio-economic survey methods. Question 2 tests weather systems, equipment operation, and physical data graphs.

2 題目 · 60 分

題目 1 · Fieldwork Planning, Data Plotting, and Hypothesis Analysis

30 分

A group of students in a city named Westport wanted to investigate the impact of urbanization on environmental quality and traffic. They set up a transect starting from the edge of the central business district (CBD) out to the rural-urban fringe.

They formulated two hypotheses:
- Hypothesis 1: Environmental quality improves and traffic congestion decreases as distance from the CBD increases.
- Hypothesis 2: Pedestrian flows are positively correlated with the diversity of retail and service types at each site.

To conduct their investigation, they selected 5 survey sites along a 5 km straight-line transect. The distance of each site from the CBD is shown below:
- Site 1: 0.5 km
- Site 2: 1.5 km
- Site 3: 2.5 km
- Site 4: 3.5 km
- Site 5: 4.5 km

(a) Sampling Method:
(i) Explain how the students could use systematic sampling to choose these five sites.
(ii) State one advantage and one disadvantage of using systematic sampling along a transect.

(b) Environmental Quality Assessment (EQA):
The students designed a bipolar EQA matrix to score each site on a scale of -2 (very poor) to +2 (excellent) across four categories: Litter, Noise Pollution, Building Condition, and Green Space.
(i) Design a clear, blank bipolar EQA scoring row for the category "Litter" showing the scoring range and brief descriptions for the extreme scores (-2 and +2).
(ii) Suggest three steps the students should take to ensure that their subjective EQA scores are reliable and consistent across all five sites.

(c) Data Plotting and Relationship:
At each site, the students also completed a 10-minute traffic count of moving vehicles. The results of their fieldwork are shown in Table 1:

Table 1:
- Site 1 | Distance: 0.5 km | Total EQA Score (out of 8): -5 | Traffic Count (vehicles/10 min): 160
- Site 2 | Distance: 1.5 km | Total EQA Score (out of 8): -2 | Traffic Count (vehicles/10 min): 110
- Site 3 | Distance: 2.5 km | Total EQA Score (out of 8): +2 | Traffic Count (vehicles/10 min): 75
- Site 4 | Distance: 3.5 km | Total EQA Score (out of 8): +5 | Traffic Count (vehicles/10 min): 40
- Site 5 | Distance: 4.5 km | Total EQA Score (out of 8): +7 | Traffic Count (vehicles/10 min): 12

(i) Describe how to plot the data for Site 3 on a scatter graph where the horizontal (X) axis represents the "Total EQA Score" (ranging from -8 to +8) and the vertical (Y) axis represents the "Traffic Count" (ranging from 0 to 180).
(ii) Identify and describe the relationship shown by the scatter graph pattern.

(d) Hypothesis Evaluation:
Evaluate Hypothesis 1: "Environmental quality improves and traffic congestion decreases as distance from the CBD increases." Use evidence from Table 1 to support your conclusion.

(e) Pedestrian and Retail Survey:
To test Hypothesis 2, the students conducted a 5-minute pedestrian count and mapped the functional land use (number of different retail/service types) at each site.
(i) Why did they conduct the pedestrian counts at three identical time slots (08:30, 13:00, and 17:00) at each site?
(ii) Describe how the students could accurately conduct the land-use classification and record the variety of services within 50 meters of each site.

(f) Evaluation:
Identify three potential errors or limitations in the students' data collection methods, and suggest a practical improvement for each.

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解題

Part (a):
(i) The students would first lay out a 5 km transect line on a map starting from the CBD boundary. They would select their first site at 0.5 km, and then measure equal intervals of exactly 1.0 km to locate the subsequent sites (1.5 km, 2.5 km, 3.5 km, and 4.5 km).
(ii) Advantage: It removes researcher bias in choosing sites and ensures even coverage across the entire length of the study transect. Disadvantage: It might miss highly significant urban features (e.g., parks or major intersections) if they fall between the pre-selected 1 km interval points.

Part (b):
(i) A bipolar row could be formatted as:
Litter: [ -2: Large amounts of accumulated garbage, hazardous waste ] [ -1 ] [ 0 ] [ +1 ] [ +2: Spotless, no visible litter, plenty of bins ].
(ii) 1. Have the same group of students score all 5 sites to minimize personal bias. 2. Calculate the average score from 3 or 4 student responses at each site. 3. Agree on objective descriptor criteria for each scoring category prior to beginning the survey.

Part (c):
(i) Locate the value $+2$ on the horizontal axis (EQA Score). Move vertically up to the line corresponding to 75 on the vertical axis (Traffic Count) and draw a clear point, cross, or dot at this intersection.
(ii) There is a strong negative (inverse) correlation. As the EQA score increases, the traffic count decreases.

Part (d):
The hypothesis is fully supported. Environmental quality score increases systematically from the CBD outwards (from -5 at Site 1 to +7 at Site 5). Simultaneously, traffic congestion (measured by traffic count) decreases steadily (from 160 vehicles at Site 1 to 12 vehicles at Site 5). For example, Site 1 (0.5 km) has the worst quality (-5) and highest traffic (160), whereas Site 5 (4.5 km) has the best quality (+7) and lowest traffic (12).

Part (e):
(i) Standardizing the times ensures a fair test, allowing direct comparisons of pedestrian density by accounting for rush hours and lunch peaks.
(ii) Students can use a standardized land-use map key (e.g., residential, commercial, public services, empty). They walk a 50m radius, tally each unique shop/service type, and record this on a pre-prepared land-use classification sheet.

Part (f):
1. Traffic count duration is too short (10 mins). Improvement: Count for 30 minutes or at different times of the day.
2. EQA is subjective. Improvement: Use digital meters (e.g., sound level decibel meter) to replace subjective rankings.
3. Transect is only 1 line, which may not represent the whole city. Improvement: Repeat the transect in 3 different directions from the CBD (radial transects) and average the data.

評分準則

Part (a) [Total: 4 marks]
- (i) 2 marks: 1 mark for specifying the starting point/transect line on a map; 1 mark for mentioning the regular intervals of 1.0 km starting from 0.5 km.
- (ii) 2 marks: 1 mark for a valid advantage (e.g., unbiased, uniform coverage); 1 mark for a valid disadvantage (e.g., may miss key sites due to systematic spacing).

Part (b) [Total: 5 marks]
- (i) 2 marks: 1 mark for structured scale from -2 to +2 (or equivalent polarities); 1 mark for contrasting descriptors of litter at -2 and +2.
- (ii) 3 marks: 1 mark per valid reliability method (e.g., averaging multiple student sheets, pre-agreeing definitions/exemplars, using the same group at each site).

Part (c) [Total: 5 marks]
- (i) 2 marks: 1 mark for identifying $+2$ on the X-axis; 1 mark for locating the point exactly at 75 on the Y-axis.
- (ii) 3 marks: 1 mark for identifying "negative/inverse correlation"; 2 marks for explaining the relationship (higher EQA scores correspond to fewer vehicles/lower traffic).

Part (d) [Total: 5 marks]
- 1 mark for stating that the hypothesis is fully supported/true.
- 2 marks for supporting data showing environmental quality improvement (quotes Site 1 as -5 and Site 5 as +7, or describes the upward trend).
- 2 marks for supporting data showing traffic decrease (quotes Site 1 as 160 and Site 5 as 12, or describes the downward trend).

Part (e) [Total: 5 marks]
- (i) 2 marks: 1 mark for understanding variables must be controlled (fair test); 1 mark for linking to temporal patterns (peaks at rush hour vs midday lull).
- (ii) 3 marks: 1 mark for using a pre-determined categorization system; 1 mark for physically surveying/mapping within the 50m zone; 1 mark for recording unique functions/tallying variety.

Part (f) [Total: 6 marks]
- 3 marks for identifying clear limitations (e.g., short 10-min traffic count, seasonal/daily bias, subjective EQA, single transect line).
- 3 marks for linking each limitation to a valid, practical improvement.

題目 2 · Fieldwork Planning, Data Plotting, and Hypothesis Analysis

30 分

A class of geography students investigated the microclimate of their school campus. They wanted to see how surface cover and built structures influenced local temperature, relative humidity, and wind characteristics.

They chose four contrasting sites on campus:
- Site A: Main playground (asphalt/tarmac surface, open space)
- Site B: School playing field (short-cut grass surface, open space)
- Site C: School nature reserve (woodland/shaded soil canopy)
- Site D: Internal courtyard (paved surface, enclosed on 4 sides by 3-story buildings)

They set two hypotheses:
- Hypothesis 1: Temperatures are higher and relative humidity is lower over artificial surfaces compared to natural surfaces at midday.
- Hypothesis 2: Wind speed is lower, but wind direction is more variable, in enclosed courtyard spaces than in open spaces.

(a) Temperature and Humidity Instrumentation:
(i) The students used a handheld digital thermo-hygrometer to collect air temperature and relative humidity. State two rules they must follow when holding this instrument to ensure their measurements are not influenced by their own bodies or direct solar radiation.
(ii) Traditional weather stations use a Stevenson Screen. Explain how the following design features of a Stevenson Screen ensure accurate measurements:
- The screen is painted white.
- The screen has double-louvered (slatted) sides.
- The screen is positioned exactly 1.25 meters above the ground.

(b) Wind Measurements:
(i) Name the correct instruments used to measure wind speed and wind direction.
(ii) Describe how the students would use a handheld digital anemometer to measure wind speed at Site B (the open field) to get a reliable reading.

(c) Data Presentation and Comparison:
Table 2 shows the microclimate measurements recorded by the students at 13:00:

Table 2:
- Site A (Tarmac) | Temp (°C): 27.5 | Rel. Humidity (%): 38 | Avg. Wind Speed (km/h): 12 | Wind Direction: SW
- Site B (Grass) | Temp (°C): 24.0 | Rel. Humidity (%): 52 | Avg. Wind Speed (km/h): 14 | Wind Direction: SW
- Site C (Woodland)| Temp (°C): 21.5 | Rel. Humidity (%): 68 | Avg. Wind Speed (km/h): 3 | Wind Direction: Calm
- Site D (Courtyard)| Temp (°C): 26.5 | Rel. Humidity (%): 42 | Avg. Wind Speed (km/h): 2 | Wind Direction: Variable

(i) Outline how to construct a combined bar-and-line graph to display both the Temperature and Relative Humidity data from Table 2 on one single chart.
(ii) Identify the key differences in microclimate between the natural surfaces (Sites B and C) and the artificial surfaces (Sites A and D).

(d) Hypothesis 1 Evaluation:
To what extent does the evidence in Table 2 support Hypothesis 1: "Temperatures are higher and relative humidity is lower over artificial surfaces compared to natural surfaces at midday"? Support your answer with data.

(e) Explanation and Extension:
(i) Using geographical knowledge, explain why the courtyard (Site D) has a low wind speed and variable wind direction compared to the school field (Site B).
(ii) Explain how the students could extend this microclimate study to investigate the impact of the school buildings on wind patterns, outlining the method they would use.

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解題

Part (a):
(i) 1. Hold the instrument at arm's length away from the body to prevent body heat from warming the sensor. 2. Shade the sensor with your hand/body or a clipboard so it is not in direct sunlight (avoiding direct solar radiation warming the sensor).
(ii) White paint reflects solar radiation (prevents heating of air inside). Louvers allow air to circulate freely (ensures the air inside represents actual outdoor air temperature) while keeping out direct sunlight. 1.25m height avoids ground-level heat radiation/conduction and avoids ground dampness affecting humidity readings.

Part (b):
(i) Wind speed: Anemometer. Wind direction: Wind vane.
(ii) Hold the anemometer at arm's length, pointing the cups/fan blades directly into the wind. Hold it at a consistent height (e.g., 1.5 meters). Take three separate readings over a 2-minute period and calculate the average wind speed.

Part (c):
(i) Use a dual Y-axis graph. On the left Y-axis, plot Temperature in °C (0 to 30) using bars. On the right Y-axis, plot Relative Humidity in % (0 to 100) using a line. The X-axis represents the four sites (A, B, C, D). Plot Site A as a bar up to 27.5 and a line point at 38, repeating this for all sites.
(ii) Natural surfaces (Sites B and C) are cooler (temperatures of 24.0°C and 21.5°C) and more humid (relative humidity of 52% and 68%). Artificial surfaces (Sites A and D) are warmer (27.5°C and 26.5°C) and drier (38% and 42%).

Part (d):
The hypothesis is fully supported. Artificial surfaces (Site A and Site D) have higher midday temperatures (27.5°C and 26.5°C respectively) compared to natural surfaces (Site B at 24.0°C and Site C at 21.5°C). Relative humidity is also lower on the artificial surfaces (Site A is 38% and Site D is 42%) compared to the natural surfaces (Site B is 52% and Site C is 68%).

Part (e):
(i) Site D is enclosed by 3-story buildings which act as physical barriers, sheltering the courtyard and reducing wind speed. The buildings create turbulence, friction, and eddying currents, causing the wind direction to twist and become highly variable/unstable compared to the open playing field (Site B), which has no obstructions to block or redirect wind flows.
(ii) Students could set up a grid pattern around the main school building (e.g., measuring wind speed/direction at 5-meter intervals on the windward, leeward, and side walls). They would record data simultaneously using multiple handheld anemometers and wind vanes to map microclimate wind tunnels, sheltering effects, or building corner turbulence.

評分準則

Part (a) [Total: 6 marks]
- (i) 2 marks: 1 mark for keeping away from body heat (arm's length); 1 mark for shading from direct sunlight.
- (ii) 4 marks: 1 mark for white paint (reflects solar radiation); 1 mark for louvers (allows ventilation/prevents stagnant air); 1 mark for keeping out direct rain/sunlight; 1 mark for 1.25m height (prevents ground-level radiation/conduction/surface interference).

Part (b) [Total: 5 marks]
- (i) 2 marks: 1 mark for Anemometer; 1 mark for Wind vane (accept wind sock).
- (ii) 3 marks: 1 mark for holding it at eye/arm level facing the wind; 1 mark for letting it spin/stabilize; 1 mark for taking multiple readings and calculating an average.

Part (c) [Total: 6 marks]
- (i) 3 marks: 1 mark for dual Y-axes properly scaled and labeled; 1 mark for plotting bars for temperature; 1 mark for plotting a line for relative humidity.
- (ii) 3 marks: 1 mark for identifying the overall trend (natural = cooler/wetter, artificial = warmer/drier); 2 marks for using contrasting data from Table 2 to support (e.g., comparing Site A with Site C).

Part (d) [Total: 5 marks]
- 1 mark for stating that the hypothesis is fully supported.
- 2 marks for temperature comparisons using specific data (e.g., Tarmac at 27.5°C vs Woodland at 21.5°C).
- 2 marks for relative humidity comparisons using specific data (e.g., Tarmac at 38% vs Woodland at 68%).

Part (e) [Total: 8 marks]
- (i) 4 marks: 1 mark for explaining obstruction/barrier effect of walls; 1 mark for friction reducing velocity; 1 mark for eddying/wind deflection causing variable directions; 1 mark for contrasting with Site B's lack of obstacles allowing laminar flow.
- (ii) 4 marks: 1 mark for using a grid sampling/systematic layout around a building; 1 mark for measuring on windward and leeward sides; 1 mark for recording wind speed and direction; 1 mark for mapping/identifying patterns like wind corridors/tunnels.

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