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Thinka May 2025 HL (TZ3) IB Diploma Programme-Style Mock — Geography

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An original Thinka practice paper modelled on the structure and difficulty of the May 2025 HL (TZ3) IB Diploma Programme Geography paper. Not affiliated with or reproduced from IB.

Paper 1 (Geographic Options)

Answer all parts of the questions for three options from the seven available options.
12 PastPaper.question · 41.97 PastPaper.marks
PastPaper.question 1 · Short Answer
1.33 PastPaper.marks
State one physical factor that can increase the lag time on a hydrograph and outline how it works.
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PastPaper.workedSolution

Vegetation cover increases interception and infiltration, reducing surface runoff and slowing down the movement of water to the channel. Alternatively, a larger drainage basin means water has to travel a greater distance to reach the gauging station, thereby increasing the lag time.

PastPaper.markingScheme

Award 1 mark for identifying a valid physical factor (e.g., dense vegetation, low drainage density, large basin size, permeable geology/soils, gentle slopes) and 0.33 marks for a brief, accurate outline of how it delays the water reaching the channel.
PastPaper.question 2 · Short Answer
1.33 PastPaper.marks
Outline one positive feedback mechanism associated with the warming of oceans.
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PastPaper.workedSolution

As ocean temperatures rise, the solubility of carbon dioxide in water decreases, causing the ocean to release CO2 back into the atmosphere. This increased atmospheric CO2 enhances the greenhouse effect, raising global temperatures further and warming the oceans even more. Another acceptable feedback is the melting of sea ice (reducing albedo) which leads to more heat absorption by the dark ocean water.

PastPaper.markingScheme

Award 1 mark for identifying the components of the positive feedback loop (e.g., warming leading to less ice or CO2 release, leading to more heat absorption or enhanced greenhouse effect) and 0.33 marks for clearly linking them back to the self-reinforcing nature of the process.
PastPaper.question 3 · Short Answer
1.33 PastPaper.marks
Outline how freeze-thaw weathering contributes to the formation of scree slopes in cold, arid environments.
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PastPaper.workedSolution

In cold environments with diurnal temperature fluctuations around 0°C, water enters joints and cracks in rocks. When it freezes, its volume increases by about 9%, exerting immense internal pressure. Repeated cycles of freezing and thawing shatter the rock (frost wedging). Gravity then pulls these loosened fragments down the slope, where they accumulate at the base to form a scree (or talus) slope.

PastPaper.markingScheme

Award 1 mark for explaining the physical process of water expansion during freezing (9% volume increase) and subsequent rock shattering, and 0.33 marks for explaining how gravity and accumulation form the scree slope.
PastPaper.question 4 · Short Answer
1.33 PastPaper.marks
Outline how the VEI (Volcanic Explosivity Index) is calculated using specific eruptive characteristics.
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PastPaper.workedSolution

The Volcanic Explosivity Index (VEI) is a logarithmic scale (from 0 to 8) used to measure the relative explosiveness of volcanic eruptions. It is determined primarily by the volume of volcanic products (tephra/pyroclastic material ejected) and the height of the eruption plume/column. Other qualitative factors, such as the duration of the continuous explosive phase, can also be considered.

PastPaper.markingScheme

Award 1 mark for identifying the two primary parameters: volume of eruptive material (tephra/pyroclastic density) and the height of the eruption column. Award 0.33 marks for indicating that the scale is logarithmic or describing how these characteristics determine the numeric value (0-8).
PastPaper.question 5 · Short Answer
1.33 PastPaper.marks
State and briefly explain one reason why a country might experience 'tourism leakage'.
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PastPaper.workedSolution

Tourism leakage happens when the economic revenue generated by tourism does not remain in the host country's economy. A key reason is that large multinational corporations (such as foreign-owned resort chains, airlines, or travel agencies) operate the tourism infrastructure and repatriate their profits to their headquarters in high-income countries. Additionally, importing foreign goods and services to satisfy tourist preferences contributes to leakage.

PastPaper.markingScheme

Award 1 mark for identifying a valid cause of leakage (repatriation of profits by MNCs, import of foreign goods/food, foreign ownership of infrastructure) and 0.33 marks for explaining how this leads to capital leaving the local economy.
PastPaper.question 6 · Short Answer
1.33 PastPaper.marks
State the meaning of the term 'food security' according to the FAO definition.
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PastPaper.workedSolution

According to the Food and Agriculture Organization (FAO), food security is achieved when all people, at all times, have physical, social, and economic access to sufficient, safe, and nutritious food that meets their dietary needs and food preferences for an active and healthy life.

PastPaper.markingScheme

Award 1 mark for identifying the core pillars: physical/economic access and sufficient/safe/nutritious food. Award 0.33 marks for mentioning the temporal aspect ('at all times') or meeting dietary needs/preferences.
PastPaper.question 7 · Short Answer
1.33 PastPaper.marks
Outline one economic pull factor that drives rapid rural-to-urban migration in low-income countries.
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PastPaper.workedSolution

An economic pull factor is the expectation of better-paying jobs and employment opportunities in cities. Urban areas often host formal industries, service sectors, and informal economies that offer higher and more stable cash incomes compared to the subsistence-dominated agriculture of rural areas, which is vulnerable to climate variation and crop failure.

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Award 1 mark for identifying the job opportunities or wage differential, and 0.33 marks for explaining the contrast with rural economic conditions (e.g., subsistence agriculture or underemployment).
PastPaper.question 8 · Short Answer
1.33 PastPaper.marks
State and outline one national policy aimed at reducing household water consumption.
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PastPaper.workedSolution

Governments can introduce smart water meters coupled with progressive block tariffs (water pricing). Under this policy, households are charged a low rate for a basic allocation of water, but the price per litre increases sharply for higher consumption brackets. This provides a strong financial incentive for households to conserve water and repair leaks.

PastPaper.markingScheme

Award 1 mark for identifying a specific national policy (e.g., water meters/progressive pricing, mandatory dual-flush toilets/appliances efficiency standards, public education campaigns) and 0.33 marks for outlining how it directly reduces household usage.
PastPaper.question 9 · short-answer
1.33 PastPaper.marks
Outline how rapid urbanization within a drainage basin can alter the lag time of a storm hydrograph.
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PastPaper.workedSolution

Urbanization leads to the replacement of vegetated, permeable soils with impermeable surfaces like tarmac, concrete, and buildings. This reduces infiltration and interception, dramatically increasing surface runoff (overland flow). Additionally, modern urban drainage systems and gutters are designed to transport rainwater directly and efficiently into local river channels. The combination of these factors results in a much faster hydrological response, significantly shortening the lag time (the time between peak rainfall and peak discharge) and raising the peak discharge on a storm hydrograph.

PastPaper.markingScheme

Award 1 mark for clearly identifying that the lag time is reduced or shortened. Award the remaining 0.33 marks for outlining the physical mechanism, such as the increase of impermeable surfaces reducing infiltration, or the role of artificial drainage networks in accelerating surface runoff/overland flow.
PastPaper.question 10 · Extended response
10 PastPaper.marks
Examine the effectiveness of integrated drainage basin management (IDBM) strategies in resolving conflicting water demands in one or more named river basins.
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PastPaper.workedSolution

An effective response should define Integrated Drainage Basin Management (IDBM) as a holistic approach to managing water resources sustainably across an entire catchment. Candidates should introduce a specific case study, such as the Murray-Darling Basin, the Colorado River, or the River Rhine.

The essay should analyze conflicting water demands among stakeholders, including agriculture (irrigation), urban/domestic consumption, industrial use, and environmental conservation. For instance, in the Murray-Darling Basin, conflict exists between upstream irrigators and downstream ecological flows.

Candidates must examine specific IDBM strategies, such as water licensing, buybacks, restoration of wetlands, and cross-boundary political agreements. The evaluation should highlight successes (e.g., restored habitats, improved water efficiency) and limitations (e.g., enforcement challenges, political disagreements, impacts of climate change on water availability).

A strong conclusion should weigh the overall effectiveness, acknowledging that while IDBM provides a vital collaborative framework, political and economic priorities often challenge its ideal implementation.

PastPaper.markingScheme

Marks should be awarded according to the following 10-mark rubric:

Level 1 (1-3 marks): Describes basic IDBM concepts or water conflicts with limited case study detail. Structural organization is weak.

Level 2 (4-6 marks): Explains conflicting demands and some IDBM strategies. Includes some case study details, but the examination remains mostly descriptive rather than analytical.

Level 3 (7-8 marks): Examines the effectiveness of IDBM strategies using a well-developed case study. Well-structured with balanced arguments addressing different stakeholders.

Level 4 (9-10 marks): Evaluates the effectiveness of IDBM comprehensively. Demonstrates deep understanding of complex stakeholder relationships and offers a nuanced, synthesis-driven conclusion supported by precise case study evidence.

PastPaper.question 11 · Extended response
10 PastPaper.marks
Evaluate the role of local and global stakeholders in managing the challenges associated with climate change in periglacial environments.
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PastPaper.workedSolution

Candidates should identify the key challenges climate change poses to periglacial environments, such as permafrost thaw, thermokarst subsidence, solifluction, and the disruption of indigenous livelihoods and infrastructure. They must distinguish between local and global stakeholders.

Local stakeholders (such as indigenous Arctic communities, local governments, and resource extraction companies) focus on adaptation. Strategies include installing thermosyphons to stabilize building foundations, adapting subsistence hunting routes, and constructing elevated infrastructure. The strength of local action is immediate, site-specific utility, but it is limited by high costs and inability to stop the root cause of warming.

Global stakeholders (such as international organizations, NGOs, and foreign governments participating in agreements like the Paris Accord) focus on mitigation to reduce greenhouse gas emissions. While mitigation is the only long-term solution to preserve periglacial landscapes, global agreements suffer from slow implementation, lack of enforcement, and geopolitical disagreements.

A strong evaluation will conclude that while local stakeholders are vital for immediate survival and adaptation, their efforts are unsustainable without coordinated, effective global mitigation strategies.

PastPaper.markingScheme

Marks should be awarded according to the following 10-mark rubric:

Level 1 (1-3 marks): Mentions basic impacts of climate change in periglacial areas or identifies stakeholders with little evaluation or case study detail.

Level 2 (4-6 marks): Explains some actions taken by local and/or global stakeholders with moderate detail. The response is mostly descriptive with limited evaluative structure.

Level 3 (7-8 marks): Evaluates the roles of both local and global stakeholders with clear structure. Supports arguments with appropriate examples from periglacial regions (e.g., Alaska, Siberia, or Northern Canada).

Level 4 (9-10 marks): Offers a sophisticated, balanced evaluation of the synergies and tensions between local adaptation and global mitigation. The response displays excellent geographic terminology and a well-synthesized conclusion.

PastPaper.question 12 · Extended response
10 PastPaper.marks
Examine the geographic factors that influence the spatial distribution of international sporting events.
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PastPaper.workedSolution

Candidates should analyze multiple geographic factors influencing where international sporting events (such as the Olympic Games, FIFA World Cup, or Formula 1 Grands Prix) are located. Factors should be categorized and illustrated with real-world examples.

Physical factors: Climate and topography are essential. For example, the Winter Olympics require specific alpine relief and reliable snow cover, while extreme heat in summer host countries (e.g., Qatar 2022) can force scheduling shifts.

Socio-economic factors: Host nations require massive capital investment, existing transport networks, advanced sporting infrastructure, and hotel capacity. This naturally concentrates major events in high-income countries or rapidly emerging economies (e.g., BRICS nations).

Political and geopolitical factors: Governments use events for national branding ('soft power') or urban regeneration (e.g., London 2012 Olympic legacy). Decisions are also shaped by international sporting bodies' policies to rotate events globally to expand their markets (e.g., FIFA's regional rotation policy).

An effective examination will show that while physical factors set baseline possibilities, human economic and political factors are the primary drivers of modern spatial distribution.

PastPaper.markingScheme

Marks should be awarded according to the following 10-mark rubric:

Level 1 (1-3 marks): Lists a few basic reasons why events are hosted in certain countries with minimal geographical depth or structure.

Level 2 (4-6 marks): Explains several physical and human factors affecting the distribution of events, with some examples, though the analysis remains superficial.

Level 3 (7-8 marks): Examines a balanced range of physical, socio-economic, and political factors using precise case studies (e.g., specific Olympics or World Cups). Highly structured.

Level 4 (9-10 marks): Provides a comprehensive, critical examination of the spatial distribution. Evaluates the shifting dynamics of global sports hosting, utilizing precise geographic terminology and a robust, well-reasoned conclusion.

Paper 3 (HL Global Interactions)

Answer both parts of one question from a choice of three options.
2 PastPaper.question · 28 PastPaper.marks
PastPaper.question 1 · essay
12 PastPaper.marks
Analyze how physical geography influences the distribution and vulnerability of global digital networks.
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PastPaper.workedSolution

### Introduction
Global digital networks (such as fiber-optic undersea cables, landing stations, and data centers) are often perceived as weightless and virtual. However, they rely on a massive physical infrastructure that is deeply influenced by physical geography. Physical geography shapes where these networks are located (distribution) and how prone they are to disruptions (vulnerability).

### Distribution of Global Digital Networks
* **Submarine Cable Routes and Bathymetry:** Over 95% of international data is transmitted via undersea fiber-optic cables. Their distribution is heavily dictated by ocean floor topography. Cable routes must avoid deep ocean trenches, steep continental slopes, and active underwater volcanic chains to prevent physical strain. Instead, they are routed along wide, flat continental shelves.
* **Choke Points and Landing Sites:** Digital networks converge at specific coastal locations (landing stations) that require stable, flat geomorphology. This creates geographical bottlenecks or "choke points" such as the Red Sea, the Strait of Malacca, and the English Channel, where narrow maritime pathways force cables into high-density corridors.
* **Climatic Influences on Data Centers:** Data centers generate immense heat. Their spatial distribution is increasingly influenced by climate. Tech multinationals (e.g., Facebook, Google) often locate massive server farms in high-latitude, cold-climate countries (such as Sweden, Iceland, or Ireland) to utilize "free cooling" from the ambient air, significantly reducing energy and operational costs.

### Vulnerability of Global Digital Networks
* **Tectonic Hazards:** Active plate boundaries present significant physical vulnerabilities. Submarine earthquakes and resulting landslides can sever multiple cables simultaneously. For example, the 2006 Hengchun earthquake off the coast of Taiwan damaged several major trans-Pacific cables, disrupting communications across East Asia for weeks.
* **Extreme Weather and Sea-Level Rise:** Coastal landing stations and terrestrial fiber corridors are highly vulnerable to coastal erosion, hurricanes, and flooding. Sea-level rise poses a long-term physical threat to low-lying coastal infrastructure where transoceanic cables meet land.
* **Continental Isolation and Landlocked Barriers:** Mountainous terrain and landlocked geography increase the vulnerability and cost of terrestrial network extension. Landlocked nations (e.g., Nepal or Bolivia) must rely on overland trans-border cables from coastal neighbors, which are more susceptible to physical disruption from landslides, soil erosion, and human construction than deep-sea cables.

### Conclusion
While global digital networks enable instantaneous virtual interactions, they remain fundamentally grounded in physical reality. Physical geography—from the topography of the deep ocean floor to tectonic activity and regional climates—continues to dictate where digital infrastructure is built and how vulnerable it remains to natural disruptions.

PastPaper.markingScheme

**Level 1 (1–4 marks):**
* The response provides a basic or fragmented description of digital networks (like cables or satellites).
* Mentions physical geography or hazards in a limited, generalized way.
* Lacks specific geographical vocabulary or case studies.

**Level 2 (5–8 marks):**
* The response explains some ways in which physical geography (e.g., oceans, earthquakes, or cold climates) affects either the distribution or the vulnerability of digital networks.
* Includes some appropriate geographic terminology and refers to general examples (such as cables under oceans or data centers in cold countries).
* May be unbalanced, focusing heavily on distribution over vulnerability, or vice versa.

**Level 3 (9–12 marks):**
* The response provides a balanced and detailed analysis of both distribution (where networks are placed due to topography, climate, and coastal features) and vulnerability (how tectonic hazards, extreme weather, and landlocked geography pose risks).
* Utilizes precise geographical terminology (e.g., bathymetry, choke points, continental shelves, landing stations).
* Employs well-chosen, real-world examples (e.g., specific submarine cable routes, tectonic events like the Taiwan earthquake, or data centers in the Nordics) to support the analysis.
PastPaper.question 2 · essay
16 PastPaper.marks
“The expansion of global supply chains and digital networks has made national borders obsolete.” To what extent do you agree with this statement?
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PastPaper.workedSolution

### Model Essay Outline

**1. Introduction**
* **Define key terms:** Global supply chains (global production networks), digital networks (the internet, financial and data flows), and national borders (political, physical, and regulatory boundaries representing sovereignty).
* **Thesis Statement:** Although the acceleration of digital networks and transnational supply chains has weakened traditional border controls over capital and information, borders are far from obsolete. Instead, they are being actively reinforced and re-engineered by states to regulate the movement of people, manage geopolitical risks, and assert digital sovereignty.

**2. Arguments supporting the 'obsolescence' of borders**
* **Frictionless Digital Flows:** The internet, cloud computing, and financial networks allow instantaneous transfers of data and capital across the globe, making physical borders irrelevant for transactions (e.g., cryptocurrency, high-frequency trading).
* **Transnational Supply Chains:** Large TNCs (e.g., Apple, Toyota) coordinate complex, multi-country supply chains that treat national territories as a seamless landscape for production, leveraging regulatory differences (regulatory arbitrage) rather than being stopped by borders.
* **Supranational Agreements:** Organizations like the European Union (Schengen Area) have deliberately removed internal physical borders to facilitate the free movement of goods, services, capital, and labor.

**3. Arguments refuting the 'obsolescence' of borders (The persistence and reinforcement of borders)**
* **Digital Sovereignty and the 'Splinternet':** Nation-states are actively placing borders on the digital world. Examples include China's Great Firewall, Russia's sovereign internet initiatives, and the EU's General Data Protection Regulation (GDDR) which forces companies to store data within physical geographical boundaries.
* **Resurgent Physical Borders and Migration Control:** National borders have been heavily securitized to restrict the flow of people. The proliferation of border walls (e.g., US-Mexico border, EU external borders) and strict immigration laws demonstrate that borders remain highly active physical barriers.
* **Economic Nationalism and Geopolitics:** Geopolitical friction has led to 'reshoring' or 'nearshoring' of critical supply chains. Examples include the US CHIPS and Science Act, designed to bring semiconductor manufacturing back within national borders due to security concerns, showing that states prioritize physical border control over free market efficiency.
* **Emergency Border Closures:** Events such as the COVID-19 pandemic demonstrated how quickly nation-states can shut down borders to international travel, asserting ultimate sovereign control.

**4. Synthesis and Evaluation**
* Borders have not disappeared; rather, their function has shifted. They act as **selective filters** ('asymmetric permeability') rather than absolute barriers—highly open to elite travelers and corporate investment, but highly closed to asylum seekers, migrants, and unregulated foreign tech firms.

**5. Conclusion**
* Conclude that while the nature of national borders has been fundamentally challenged by globalization, they remain a primary tool for state power and identity. The concept of a 'borderless world' is an oversimplification; instead, we are witnessing a re-bordering process where physical and digital boundaries are adapted to manage global interactions.

PastPaper.markingScheme

### Markbands for 16-Mark Essay (Paper 3, Part B)

* **Level 1 (1–4 marks):** The response is descriptive and shows limited understanding of the topic. It may identify a few global flows or borders but lacks structure, focus, and geographical terminology. Evaluation is absent or superficial.
* **Level 2 (5–8 marks):** The response demonstrates some knowledge of global supply chains and digital networks. There is a basic attempt to address the question, but the argument is largely one-sided (focused only on borders disappearing or only on borders remaining). Examples are weak or generic, and the structure is loosely organized.
* **Level 3 (9–12 marks):** The response shows a good understanding of both sides of the argument. It successfully balances the frictionless nature of global networks against the ways states reassert border control. It includes specific geographical case studies or examples (such as the EU, China's firewall, or supply chain reshoring). The essay is well-structured and reaches a logical conclusion.
* **Level 4 (13–16 marks):** The response demonstrates a sophisticated and critical understanding of the prompt. It provides a highly structured, balanced, and synthesized evaluation. It uses precise geographical terminology and robust, up-to-date examples (such as GDPR, tech nationalism, or semiconductor supply chains). It recognizes that borders are not simply obsolete or absolute, but have transformed into complex, selective filters. The evaluation is coherent, insightful, and well-integrated throughout.

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