GCSE Geography: Urbanisation and Megacities

More than half of humanity now lives in cities, and GCSE Geography's urban unit starts by asking why — and what happens when urban growth outruns everything meant to support it. This quiz covers the global side of that story.

The foundational questions pin down the vocabulary: urbanisation as the rising proportion of people living in urban areas, the megacity threshold of ten million people, and natural increase — births exceeding deaths — as one of the two engines of urban growth. The other engine, rural-urban migration, is tested through the push-pull framework: push factors like agricultural mechanisation destroying rural jobs, and pull factors like employment prospects and better services drawing people in. A trends question locates today's fastest urban growth where it actually is — Sub-Saharan Africa and Asia — not in the already-urbanised higher-income world.

The consequences questions balance opportunity against challenge, as the specification requires. Opportunities: diverse urban labour markets and access to services and education. Challenges: squatter settlements built without legal title from makeshift materials, sanitation and clean water shortfalls, waste management, and pollution. Two deeper questions probe the informal economy — why unregulated work becomes the safety net for migrants shut out of formal employment — and what squatter settlements are and are not (a question that rejects the comfortable assumption of government provision).

No city-specific statistics are used, keeping every question board-neutral. Paired with the UK Urban Change quiz, it covers the urban topic from the global scale down to the local one, apart from the named city case studies.

• Define urbanisation, megacities and natural increase
• Apply the push-pull framework to rural-urban migration
• Locate where urban growth is fastest today and explain why
• Balance the opportunities of city growth against challenges like squatter settlements and sanitation
• Explain the role of the informal economy in rapidly growing cities

Topic scope follows the urban issues core of the DfE GCSE geography subject content, common across UK exam boards: global patterns of urban change, the factors driving urbanisation and megacity growth, and the opportunities and challenges of rapid urban growth in lower-income countries and newly emerging economies.