BGCSE Geography (Botswana Senior Secondary Education BSSE): Population and Settlement

Population and Settlement

Understand population distribution and density, and how they are measured. Learn birth rate, death rate, natural increase, migration (push and pull factors), net migration and population structure. Interpret population pyramids (broad base = youthful, high growth; narrow base = ageing population) and understand the demographic transition model through its stages.

Study settlement - site and situation, nucleated and dispersed patterns, and urban hierarchies. Understand rural-to-urban migration, overpopulation, population policies (pro-natalist and anti-natalist) and carrying capacity.

Traps: confusing density (people per area) with total population; reversing push and pull factors; misreading a pyramid's shape; and assuming the demographic transition model applies identically everywhere.

Rule of thumb: birth rate − death rate = natural increase; add net migration to get total population change.

Worked example: A country has a birth rate of 35, a death rate of 10 and net migration of −2 per 1,000. Natural increase = 35 − 10 = 25 per 1,000; total change = 25 − 2 = 23 per 1,000, so the population is growing despite net emigration.

Economic Activity

Classify economic activity into primary (extracting raw materials - farming, fishing, mining, forestry), secondary (manufacturing and processing), tertiary (services - retail, tourism, transport, finance) and quaternary (knowledge-based - research, IT, finance). Understand the Clark-Fisher model: as economies develop, employment shifts from primary to secondary to tertiary. Learn formal and informal sectors, employment structure, globalisation, trade, multipliers and sustainable development.

Study location factors for industry: raw materials, power, labour, transport, market, capital, government policy and quality of life. Learn how footloose industries and transnational corporations locate globally.

Traps: classifying tourism as primary (it is tertiary); calling mining secondary (it is primary); confusing formal with informal work; and assuming all countries follow the same development path.

Rule of thumb: if you extract it, it is primary; if you make or process it, secondary; if you serve it, tertiary; if you research or analyse it, quaternary.

Worked example: A Caribbean island shifts from sugar exports to hotel-based tourism. Employment moves from primary (farming) to tertiary (hotels, transport, retail); income may rise, but the economy becomes more dependent on tourist arrivals and vulnerable to external shocks.

Agriculture, Industry and Tourism

Understand agricultural systems: inputs, processes and outputs; subsistence versus commercial farming; intensive versus extensive; arable, pastoral and mixed. Learn factors affecting farming (climate, soil, relief, market, technology, government policy) and issues such as food security, irrigation, salinisation, soil erosion and sustainable farming. In the Caribbean, study plantation history, cash crops (sugar, bananas) and diversification.

For industry, learn types (heavy, light, high-tech), location factors, industrial location change, and industrial pollution and sustainability. For tourism, learn the tourism system, types (mass, eco, cultural), the multiplier effect, seasonality, and impacts - economic (income, jobs, foreign exchange), social (cultural change, crowding) and environmental (habitat damage, pollution, water use). Understand sustainable tourism and ecotourism.

Traps: calling a plantation subsistence farming (it is commercial); confusing intensive with extensive (intensive uses more inputs per area); and assuming tourism brings only benefits.

Rule of thumb: weigh every economic gain against social and environmental costs.

Worked example: A small island increases hotel capacity. Economic gains include jobs and foreign exchange (with a multiplier effect); costs include beach erosion, water shortages, waste and seasonal unemployment. Sustainable planning caps visitor numbers, protects reefs and spreads income locally.

Urbanisation and Land Use

Understand urbanisation (the rising proportion of people living in towns and cities), urban growth and counter-urbanisation. Learn causes (rural push, urban pull, natural increase) and consequences (housing shortages, slums and squatter settlements, traffic, pollution, water and sanitation stress).

Study urban land-use models - the Burgess concentric zone model, Hoyt sector model and Harris-Ullman multiple nuclei model - and bid-rent theory (land value highest in the centre). Learn zones: CBD, inner city, inner and outer suburbs, rural-urban fringe. Understand urban planning, zoning, regeneration, sustainable cities and land-use conflicts.

Traps: confusing urbanisation (a proportion) with urban growth (a number); saying the CBD has low land values (it has the highest); and assuming models fit all cities, especially in the Caribbean where coastal location and tourism shape land use.

Rule of thumb: land value falls with distance from the centre, so high-value uses (shops, offices) outbid housing near the CBD.

Worked example: A rapidly growing city experiences rural-to-urban migration. The CBD expands upward, inner-city housing becomes overcrowded, and squatter settlements appear on the outskirts. Planning responses include upgrading services, public transport and zoning for industry away from homes.

The Bahamas and the Caribbean: Regional Geography and Hazards

Learn the regional setting: the Caribbean Sea, Atlantic Ocean, Gulf of Mexico, the Greater and Lesser Antilles, the Bahamas archipelago (low-lying limestone islands on shallow banks), and the ring of the Caribbean plate. Understand climate: tropical, with wet and dry seasons, the North East Trade Winds, the ITCZ, and the hurricane season (June–November).

Study hazards: hurricanes (formation over warm seas above about 27°C, low pressure, Coriolis spin, storm surge, wind and rain), earthquakes and volcanoes along the Lesser Antilles subduction zone, tsunamis, flooding, drought and coastal erosion. Learn preparedness, mitigation, adaptation and response - early warning, building codes, shelters, mangroves and reefs as natural defences.

Traps: saying hurricanes form at the equator (they need Coriolis deflection, so not within about 5° of it); confusing the Bahamas (low limestone, no volcanoes) with the volcanic Lesser Antilles; and forgetting that storm surge, not wind alone, causes much of the damage.

Rule of thumb: warm sea + low pressure + Coriolis = hurricane; mangroves and reefs = natural coastal defence.

Worked example: A Category 4 hurricane passes over a low Bahamian island. Expected impacts: storm surge flooding, wind damage, loss of power and water, reef and beach erosion. Mitigation includes shelters, reinforced buildings, mangrove protection and early evacuation.

Map Skills

Candidates must read and interpret maps confidently. Learn scale as a ratio (1:50,000), a statement ("1 cm to 1 km") or a linear bar; use scale to measure distance and area. Understand grid references - four-figure for a square, six-figure for a point - and direction using compass points and bearings. Interpret contours (height and steepness): close contours mean steep slopes; contours crossing a valley form a V pointing upstream; hachures mark depressions. Learn spot heights, trig points, cross-sections and gradients.

Read symbols and keys, identify settlement, land use, relief and drainage. Learn map interpretation of settlement patterns, communications and land use change.

Traps: reading eastings before northings (always "along the corridor, then up the stairs"); confusing a small-scale map (large area, little detail) with a large-scale map (small area, much detail); misreading a valley's V direction; and forgetting that scale changes with map reproduction.

Rule of thumb: for six-figure grid references, go east first, then north; for gradients, divide vertical rise by horizontal distance.

Worked example: A straight road is 4 cm on a 1:50,000 map. Real distance = 4 × 50,000 cm = 200,000 cm = 2 km. If the road rises 100 m over that distance, gradient = 100 m ÷ 2,000 m = 1 in 20.

Fieldwork and Geographical Data Interpretation

Understand the fieldwork cycle: question or hypothesis, planning, data collection, presentation, analysis and conclusion. Learn sampling methods (random, systematic, stratified) and why a sample is used; distinguish primary from secondary data, and quantitative from qualitative data. Understand reliability and validity, and the need for repeat readings and controlled methods.

Learn data presentation: bar charts, line graphs, scatter graphs, pie charts, histograms, choropleth maps, isoline maps and field sketches. Learn analysis: describe patterns, calculate means and ranges, identify trends and correlations, and recognise that correlation is not causation. Understand conclusions and evaluation - limitations, sources of error and improvements.

Traps: confusing primary with secondary data; calling a scatter graph's pattern proof of cause; ignoring sample size when judging reliability; and describing data without explaining it.

Rule of thumb: describe (what you see), then explain (why it happens), then evaluate (how reliable it is).

Worked example: A survey of pebble size along a beach shows pebbles get smaller eastward. Describe the trend; calculate the mean size at each site; suggest explanation (longshore drift and attrition); then evaluate - the sample may be small, so repeat at more sites and at different tides to improve reliability.