IB Geography Flashcards: Population Distribution
IB Geography — Population Distribution Flashcard Deck
20 flashcards with spaced repetition. Press Space to flip, then rate your recall (1—4).
Key Concepts
Demographic Transition Model (DTM) describes the shift from high birth and death rates to low rates through five stages: (1) high stationary (high birth and death rates, slow growth), (2) early expanding (death rates fall due to healthcare improvements, birth rates remain high, rapid growth), (3) late expanding (birth rates begin to fall due to urbanisation, education, contraception, growth slows), (4) low stationary (low birth and death rates, stable population), (5) declining (death rates exceed birth rates, population shrinks — e.g., Japan, Germany). The model assumes that economic development drives demographic change.
Population Pyramids visualise age and sex distribution. A wide-based pyramid indicates high birth rates and rapid growth (Stage 2 — e.g., Nigeria). A column shape indicates stable growth (Stage 4 — e.g., USA). An inverted pyramid indicates an ageing population with potential workforce shortages (Stage 5 — e.g., Japan). The dependency ratio (non-working age / working age) is revealed by the pyramid shape. Youth bulges can be a demographic dividend (if jobs are available) or a source of instability (if not).
Migration Models: Ravenstein’s laws of migration suggest most migration is short-distance, step-wise (moving progressively further), and driven by economic factors. The push-pull model identifies factors driving people away from origin (push — conflict, poverty, environmental degradation) and attracting them to destination (pull — employment, education, quality of life, political freedom). Internal migration (within countries) is more common than international migration. Brain drain occurs when skilled workers migrate to developed countries.
Population Policies: Pronatalist policies encourage births (e.g., baby bonuses, extended parental leave, tax benefits — used in France, Singapore, Japan). Antinatalist policies reduce births (e.g., China’s former one-child policy, India’s sterilisation programme, education and contraception access). Migration policies control population movement through quotas, visas, and border controls. Each policy type has intended and unintended consequences.
Intuition
The DTM is like a life story of a country’s population. At first, both birth and death rates are high (like infancy — lots of change). As healthcare improves, death rates drop first (childhood — survival improves). Birth rates drop later as societies develop (adulthood — family sizes shrink). Population pyramids are a snapshot of this story at one moment — the shape reveals where the country is in its demographic journey. Migration is like water flowing downhill — people move from areas of disadvantage to areas of opportunity.
Why it matters: Population distribution affects everything from economic growth to resource demand to political stability. Understanding demographic trends helps governments plan for healthcare, education, pensions, and infrastructure. Migration patterns shape cultural diversity, labour markets, and international relations.
Common Pitfalls
- Confusing the DTM stages. Stage 2 has falling death rates but still-high birth rates (rapid growth). Stage 3 has falling birth rates (growth slows). Stage 4 has low, stable rates. Stage 5 has declining population. The key is which rate is changing and when.
- Assuming migration is always economic. Conflict, persecution, environmental disasters, and family reunification are also major drivers. The Syrian refugee crisis was driven by conflict, not economic opportunity.
- Reading population pyramids backwards. The base represents the youngest age group; the top represents the oldest. A wide base means many young people, not many old people. The working-age population is the middle section.
- Forgetting that the DTM has limitations. It was developed for European countries and may not apply to countries with rapid technological change, high inequality, or unique cultural factors. Some countries skip stages or experience them out of order.
Cross-References
- Climate Change: Climate change drives displacement and migration, and population growth increases emissions and vulnerability.
- Economic Development: Demographic transition is closely linked to development — economic growth drives falling birth rates.
- Freshwater Issues: Population growth increases water demand, and water scarcity can drive migration.
- Urban Environments: Urbanisation is closely linked to demographic transition — urban areas have lower birth rates.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.
Advanced Content
This section provides detailed coverage of advanced concepts, including full derivations, proofs, and extended examples.
Derivations and Proofs
Complete mathematical derivations and proofs are provided where appropriate. Each step is explained to ensure understanding of the underlying reasoning.
Extended Examples
Advanced examples demonstrate the application of concepts to complex problems. These examples go beyond standard exam questions to develop deeper understanding.
Research Connections
This material connects to current research and advanced applications in the field. Understanding these connections provides context for the study material.
Prerequisites
Ensure you have mastered the prerequisite material before attempting this advanced content.