Responding to Human Processes and Population
Population structure and change
Know the demographic transition model and its limitations, population pyramids (broad base = youthful population, narrow base = ageing), and the components of change: births, deaths and net migration. Distinguish natural increase from total growth. Rates matter: crude birth rate, crude death rate, total fertility rate, infant mortality rate, life expectancy and dependency ratio all measure different things.
Movement and distribution
Explain migration with push–pull factors and intervening obstacles, and distinguish voluntary from forced migration, internal from international. Urbanisation, suburbanisation and counter-urbanisation describe different phases of settlement change. Population distribution is explained by physical factors (climate, relief, water) and human factors (employment, transport, services, conflict).
Challenges and responses
Human-process challenges include ageing populations (pension pressure, labour shortage, aged care demand), youthful populations (education and job provision), rapid urban growth (housing, sanitation, congestion, informal settlements) and rural decline. Responses range from pronatalist and antinatalist policies to migration policy, urban planning, decentralisation and infrastructure investment. Evaluate responses for unintended consequences - for example, antinatalist policy can accelerate ageing.
Traps
- Confusing population growth with natural increase.
- Treating the demographic transition model as universal rather than a generalised model.
- Describing migration without explaining the decision.
- Ignoring scale - national statistics can mask regional decline.
Rule of thumb
For any population question, ask W-H-S: What is changing (which measure), How fast and at what scale, and So what (who is affected and what response follows). Always quote rates, not just totals.