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Question 1Unit 3
Which term describes the process by which people move from rural areas into cities, increasing the proportion of a population living in urban places?
- Urbanisation Correct answer.
- Suburbanisation
- Counter-urbanisation
- Gentrification
Explanation
Urbanisation is the growth in the proportion of a population living in urban areas, driven by rural-to-urban migration and natural increase. It is a population-share concept, distinct from simple city growth in absolute numbers. Other processes describe movement outward from, or reinvestment within, already urbanised areas.
Question 2Unit 3
A country's population pyramid has a very broad base and narrows sharply toward the top. Which interpretation is most consistent with this shape?
- High birth rates with lower life expectancy Correct answer.
- A rapid decline in total population
- A large elderly dependent population
- Low birth rates with high life expectancy
Explanation
A broad base indicates a large share of children, reflecting high fertility, while the sharp narrowing upward indicates relatively few elderly people, consistent with lower life expectancy. This is a classic expansive pyramid typical of earlier stages of demographic transition.
Question 3Unit 3
Which measure expresses the number of live births per 1000 people in a population in a given year?
- Natural increase rate
- Total fertility rate
- Infant mortality rate
- Crude birth rate Correct answer.
Explanation
The crude birth rate counts live births per 1000 of the total population per year. It is called crude because it is not adjusted for age or sex structure, unlike the total fertility rate.
Question 4Unit 3
Which statement best defines carrying capacity in the context of population and resources?
- The number of people needed to sustain economic growth
- The population size at which birth rates equal death rates
- The total number of people a country can feed using imported food
- The maximum population an environment can support sustainably given available resources Correct answer.
Explanation
Carrying capacity is the maximum population that a given environment can support over time without resource degradation. It depends on technology, consumption levels and environmental limits, not on imports alone.
Question 5Unit 3
Which indicator is a composite measure combining life expectancy, education and income to compare development between countries?
- Human Development Index Correct answer.
- Physical Quality of Life Index
- Gini coefficient
- Gross Domestic Product per capita
Explanation
The Human Development Index combines health, education and income dimensions into a single summary score. GDP per capita measures only economic output per person, and the Gini coefficient measures income inequality.
Question 6Unit 3
Which factor most directly drives population growth through natural increase?
- An increase in the proportion of people living in cities
- The number of immigrants exceeding the number of emigrants
- The number of births exceeding the number of deaths Correct answer.
- A rise in the median age of the population
Explanation
Natural increase is the surplus of births over deaths in a population, excluding migration. Net migration is a separate component of population change, and ageing or urbanisation do not by themselves create natural increase.
Question 7Unit 3
A city experiences rapid population growth while its housing supply remains fixed. Which outcome is most likely according to basic supply and demand reasoning?
- Rents and house prices rise Correct answer.
- Rents fall because more people share dwellings
- Housing quality automatically improves
- Demand for housing falls
Explanation
When demand for housing increases while supply is fixed, competition for limited dwellings pushes prices and rents upward. This can worsen housing affordability and overcrowding.
Question 8Unit 3
Which of the following is an example of a push factor in migration?
- Attractive climate at the destination
- Loss of farmland due to prolonged drought Correct answer.
- Availability of better-paid jobs elsewhere
- Family already settled in a destination city
Explanation
Push factors are conditions at the origin that drive people away, such as environmental degradation or unemployment. Drought destroying farmland makes staying less viable, encouraging out-migration.
Question 9Unit 3
Which statement best describes the demographic transition model's stage 3?
- Death rates fall sharply while birth rates stay high
- Both birth and death rates are low and stable
- Birth and death rates are both high and roughly equal
- Birth rates decline while death rates remain low, slowing population growth Correct answer.
Explanation
In stage 3, death rates have already fallen and remain low, while birth rates begin to decline, so natural increase slows. Stage 2 has falling death rates with high birth rates, and stage 4 has both rates low.
Question 10Unit 3
A coastal city is expanding onto low-lying reclaimed land. Which combination best describes the increased hazard risk?
- Reduced exposure because the coast is far from rivers
- Lower risk because reclaimed land drains quickly
- Reduced flood risk because the land is flat
- Greater exposure to storm surge and sea-level rise Correct answer.
Explanation
Low-lying coastal land places people and assets within reach of storm surge, tides and rising sea levels, increasing exposure. Flatness does not reduce flood risk and can actually prolong inundation.
Question 11Unit 3
Which measure would best reduce a country's total fertility rate over the long term?
- Increasing child subsidies for large families
- Reducing access to contraception
- Expanding access to education and employment for women Correct answer.
- Lowering the legal age of marriage
Explanation
Female education and employment are strongly associated with later childbearing and lower fertility, as women gain options beyond early motherhood. Policies that restrict contraception or encourage early marriage tend to raise fertility.
Question 12Unit 3
A refugee is best distinguished from a voluntary economic migrant because a refugee:
- Returns home after a short period abroad
- Moves abroad mainly to earn higher wages
- Moves within their own country for seasonal work
- Crosses an international border fearing persecution and is entitled to protection Correct answer.
Explanation
A refugee crosses an international border owing to a well-founded fear of persecution and has a legal claim to protection under international conventions. Economic migrants move primarily for material improvement and lack that specific legal status.
Question 13Unit 3
Which pattern of population distribution is most strongly associated with arid interior regions?
- Concentration of population along the coast only
- Uniform density matching national averages
- Dense settlement spread evenly across the region
- Sparse settlement concentrated near water sources Correct answer.
Explanation
In arid regions, water availability constrains settlement, so populations cluster around oases, rivers and groundwater rather than spreading evenly. Density therefore tends to be low overall but locally concentrated.
Question 14Unit 3
A government builds a new rail line connecting a crowded capital to a secondary city. Which outcome is most consistent with counter-urbanisation theory?
- The secondary city loses population to the capital
- The capital's population density increases sharply
- All migration into the capital ceases
- Some residents and firms relocate to the secondary city Correct answer.
Explanation
Improved transport links can make commuting and relocation to smaller centres more feasible, supporting decentralisation from the capital. Counter-urbanisation involves net movement away from large urban centres.
Question 15Unit 3
Which statement best explains why the dependency ratio rises in an ageing population?
- The number of elderly dependants grows relative to the working-age population Correct answer.
- The number of children grows faster than the working-age population
- Total population falls while the workforce expands
- Birth rates rise sharply, increasing the youth share
Explanation
The dependency ratio compares dependants (young and old) with the working-age population. Ageing increases the elderly share, so more dependants are supported by each working-age person.
Question 16Unit 3
A megacity is best defined as an urban agglomeration with a population exceeding:
- 10 million people Correct answer.
- 5 million people
- 1 million people
- 20 million people
Explanation
Megacities are conventionally defined as urban agglomerations with more than 10 million residents. Smaller thresholds describe large cities or metropolises rather than megacities.
Question 17Unit 3
Which combination of factors most likely produces a youthful population structure with high natural increase?
- Balanced birth and death rates with net out-migration
- Low fertility, high life expectancy and widespread contraception
- High fertility, improving child survival and limited contraceptive access Correct answer.
- Rapid ageing with a shrinking workforce
Explanation
High fertility combined with falling child mortality and limited access to contraception produces a large young cohort and rapid natural increase. Low fertility and high life expectancy produce older structures.
Question 18Unit 3
Which statement best describes the relationship between global food supply and population growth described by Malthusian theory?
- Population grows geometrically while food supply grows arithmetically, risking checks Correct answer.
- Food shortages are caused only by conflict, not population
- Food supply always outpaces population because of technology
- Population and food supply grow at identical rates
Explanation
Malthus argued that population tends to grow geometrically while food production grows arithmetically, eventually producing checks such as famine or disease. Later critics argued technology can raise food output faster than he expected.
Question 19Unit 3
An inner-city suburb undergoes gentrification. Which change is most typical?
- Falling rents attract low-income households
- Industrial land expands into the suburb
- Population density declines sharply as people move out
- Rising property values displace lower-income residents Correct answer.
Explanation
Gentrification involves wealthier households and investors moving into formerly low-income inner areas, raising property values and rents. This can displace existing residents who can no longer afford housing.
Question 20Unit 3
A region's population is 500 000. In one year there are 8000 births, 3000 deaths, 2000 immigrants and 1500 emigrants. What is the natural increase rate per 1000 people?
- 16
- 10 Correct answer.
- 13
- 6
Explanation
Natural increase is births minus deaths: 8000 minus 3000 equals 5000. Dividing 5000 by 500 000 and multiplying by 1000 gives 10 per 1000. Migration is excluded from natural increase.
Question 21Unit 3
Two countries have identical GDP per capita, but one has a much higher Human Development Index. Which explanation is most plausible?
- The higher-HDI country has better health and education outcomes at the same income Correct answer.
- The higher-HDI country has a lower life expectancy
- The higher-HDI country has a larger total population
- The higher-HDI country has greater income inequality
Explanation
HDI incorporates health and education alongside income, so equal income can yield different HDI scores if life expectancy or schooling differs. This highlights the limitations of income-only comparisons.
Question 22Unit 3
A city's population grows rapidly but its transport network and sewerage are not expanded. Which concept best describes the resulting situation?
- Urban infrastructure deficit Correct answer.
- Demographic dividend
- Urban sprawl
- Rural depopulation
Explanation
An infrastructure deficit occurs when population growth outpaces the provision of services such as transport, water and sanitation. Sprawl refers to spatial expansion, and a demographic dividend refers to economic gains from a young workforce.
Question 23Unit 3
A country has a total fertility rate of 1.4 and net migration of zero. What is the most likely long-term demographic outcome?
- A stable population with a young age structure
- A rising youth dependency ratio
- Rapid population growth
- Population decline and ageing Correct answer.
Explanation
A fertility rate well below the replacement level of about 2.1, with no migration to offset losses, leads to population decline and an increasing elderly share. The youth dependency ratio would fall, not rise.
Question 24Unit 3
Why can a country with a high total fertility rate still show a declining crude birth rate?
- Death rates have risen sharply
- The total fertility rate ignores births entirely
- Net migration has turned negative
- The proportion of women of childbearing age has fallen Correct answer.
Explanation
The crude birth rate depends on both fertility and the number of women of reproductive age. If that cohort shrinks, births per 1000 total population can fall even when fertility per woman stays high.
Question 25Unit 3
Which scenario best illustrates the concept of environmental refugee displacement?
- Students travel abroad for a university degree
- Families move to a larger house in the same suburb
- People leave an island permanently after repeated storm damage and rising seas Correct answer.
- Workers commute seasonally to a city for construction jobs
Explanation
Environmental displacement occurs when degradation or hazard makes a home unsafe or uninhabitable, forcing permanent relocation. Seasonal work, study and local moves are voluntary and not driven by environmental loss.
Question 26Unit 3
Which term describes the number of live births per 1000 people in a population in a given year?
- Natural increase rate
- Infant mortality rate
- Crude birth rate Correct answer.
- Total fertility rate
Explanation
The crude birth rate expresses live births in a year per 1000 of the total population, without adjusting for age structure. It is called crude because it is measured against the whole population rather than women of childbearing age.
Question 27Unit 3
A population pyramid with a broad base and narrow top most likely represents a country with which characteristic?
- A high proportion of children and high fertility Correct answer.
- A declining total population with low fertility
- An even spread across all age groups
- A high proportion of elderly residents
Explanation
A broad base shows large numbers of young children relative to older cohorts, which reflects high fertility. The narrow top shows few elderly people, consistent with lower life expectancy and rapid generational replacement.
Question 28Unit 3
Which term refers to the movement of people out of a country to settle elsewhere?
- Circulation
- Immigration
- Transmigration
- Emigration Correct answer.
Explanation
Emigration is departure from a country to live in another, viewed from the origin country's perspective. Immigration is the matching arrival into a destination country.
Question 29Unit 3
Which measure expresses the number of deaths of children under one year of age per 1000 live births?
- Child dependency ratio
- Crude death rate
- Infant mortality rate Correct answer.
- Life expectancy at birth
Explanation
The infant mortality rate counts deaths before the first birthday per 1000 live births in the same year. It is a sensitive indicator of healthcare quality, sanitation and nutrition.
Question 30Unit 3
Which of the following best describes an internally displaced person?
- A person who migrates abroad for higher wages
- A person forced to flee but who remains within their own country Correct answer.
- A person granted refugee status by another nation
- A person forced to flee across an international border
Explanation
Internally displaced people have been forced from their homes by conflict, disaster or persecution but have not crossed an international border. Because they remain inside their own state, they fall outside the legal refugee framework.
Question 31Unit 3
Which term describes the average number of years a newborn can expect to live if current death rates persist?
- Crude death rate
- Dependency ratio
- Median age
- Life expectancy at birth Correct answer.
Explanation
Life expectancy at birth summarises the mortality conditions of a population into a single average number of years. It is calculated from current age-specific death rates and assumes those rates remain unchanged.
Question 32Unit 3
Which factor most directly increases the crude death rate of a country?
- A fall in the total fertility rate
- A rise in the number of young adults
- A rise in the proportion of elderly people Correct answer.
- A rise in net immigration
Explanation
Because older people have higher age-specific death rates, an ageing population raises total deaths relative to the whole population. This pushes the crude death rate up even if healthcare is improving.
Question 33Unit 3
Which statement best defines the natural increase rate of a population?
- Births plus immigration minus emigration
- Deaths minus births expressed per 1000 people
- Births minus deaths expressed per 1000 people Correct answer.
- Total births in a year divided by total deaths
Explanation
The natural increase rate is the difference between the crude birth rate and the crude death rate, expressed per 1000 people or as a percentage. It excludes migration, so it measures growth from natural change alone.
Question 34Unit 3
A country has a birth rate of 34 per 1000 and a death rate of 9 per 1000. What is its natural increase rate per 1000?
- 43
- 9
- 3.8
- 25 Correct answer.
Explanation
The natural increase rate is the crude birth rate minus the crude death rate, so 34 minus 9 equals 25 per 1000, or 2.5 percent. Migration is not part of this calculation.
Question 35Unit 3
In the demographic transition model, which stage is characterised by high birth rates and rapidly falling death rates, producing the fastest population growth?
- Stage 2 Correct answer.
- Stage 4
- Stage 3
- Stage 1
Explanation
Stage 2 sees death rates fall sharply because of improved medicine, sanitation and food supply, while birth rates remain high. The widening gap between the two rates generates the most rapid natural increase.
Question 36Unit 3
A country's population is 40 million. In one year it records 600 000 births, 400 000 deaths, 250 000 immigrants and 350 000 emigrants. What is the total population change?
- An increase of 200 000
- An increase of 100 000 Correct answer.
- An increase of 450 000
- A decrease of 100 000
Explanation
Natural increase is 600 000 minus 400 000, giving 200 000. Net migration is 250 000 minus 350 000, giving minus 100 000, so total change is 200 000 minus 100 000, an increase of 100 000.
Question 37Unit 3
Which explanation best accounts for a country having a low crude birth rate but a relatively high total fertility rate?
- Life expectancy has recently declined
- A large share of the population is past childbearing age Correct answer.
- The country has very high immigration of young adults
- Infant mortality has fallen sharply
Explanation
The crude birth rate divides births by the whole population, so an age structure with few women of childbearing age depresses it. The total fertility rate measures births per woman, so it can remain high even when total births are few relative to the population.
Question 38Unit 3
Which combination of conditions most strongly encourages emigration from a rural region?
- Rapid growth of local manufacturing jobs
- Land degradation with limited local employment Correct answer.
- Improved irrigation and rising crop yields
- High local wages and expanding services
Explanation
Land degradation reduces farm productivity and incomes, while a lack of alternative employment removes reasons to stay. Together these push factors make emigration more likely.
Question 39Unit 3
Which statement best explains why the sex ratio at birth is usually slightly male in most populations?
- Males have lower mortality at every age
- Females are undercounted in censuses
- Female migration is restricted by law
- More male than female conceptions survive to birth Correct answer.
Explanation
Biologically, slightly more males are conceived and born than females, giving a sex ratio at birth of roughly 105 boys per 100 girls. Males then experience higher mortality, so the ratio evens out or reverses in older cohorts.
Question 40Unit 3
A city's population grows by 4 percent a year while its water supply remains constant. Which concept best describes the resulting situation?
- Urban consolidation
- Carrying capacity being exceeded Correct answer.
- Demographic dividend
- Natural increase
Explanation
Carrying capacity is the maximum population an environment can support with available resources. When population growth outpaces a fixed water supply, demand approaches or exceeds that limit.
Question 41Unit 3
Which outcome is most consistent with a country entering Stage 5 of the demographic transition model?
- High birth and death rates in balance
- A natural decrease and an ageing population Correct answer.
- Rapid natural increase and a youthful pyramid
- A sharp fall in death rates with high fertility
Explanation
Stage 5 occurs when birth rates fall below death rates, producing natural decrease. Because fertility has been low for decades, the population also ages and the pyramid narrows at the base.
Question 42Unit 3
Which factor best explains why some countries with high fertility have a low median age?
- Rapid decline in infant mortality only
- Large numbers of births relative to older cohorts Correct answer.
- Sustained net emigration of young adults
- High life expectancy among the elderly
Explanation
A median age is the midpoint of the age distribution, so a large flow of births adds many young people and pulls the midpoint down. High fertility therefore keeps median age low even where life expectancy is rising.
Question 43Unit 3
Which statement best describes the difference between an asylum seeker and a refugee?
- An asylum seeker is always an economic migrant
- An asylum seeker has already been granted protection abroad
- A refugee has not crossed an international border
- An asylum seeker has applied for protection but awaits a decision Correct answer.
Explanation
An asylum seeker has left their country and formally requested protection, but their claim has not yet been assessed. A refugee is someone whose claim has been accepted under international law.
Question 44Unit 3
A government wants to reduce the pressure of a rising dependency ratio. Which policy is most directly aimed at this goal?
- Raising the retirement age to keep people in work longer Correct answer.
- Reducing the number of working-age visas
- Increasing child benefits to raise fertility
- Expanding immigration of retirees
Explanation
The dependency ratio compares dependents to the working-age population. Raising the retirement age expands the working-age group and reduces the number counted as dependent, lowering the ratio directly.
Question 45Unit 3
A rapidly urbanising country sees its capital grow from 4 million to 12 million people in twenty years, while formal housing supply lags. Which outcome is most likely?
- A decline in the city's total population
- A rapid rise in average household income
- Expansion of informal settlements and overcrowding Correct answer.
- A fall in the number of informal settlements
Explanation
When urban population growth outpaces formal housing construction, new arrivals often build or rent informal dwellings. This produces sprawling informal settlements and high occupancy rates per dwelling.
Question 46Unit 3
Which statement best explains how a large youth cohort can create a demographic dividend?
- It raises the share of working-age people relative to dependents Correct answer.
- It guarantees higher fertility in the next generation
- It increases the number of dependents per worker
- It reduces the need for investment in education
Explanation
A demographic dividend arises when a falling birth rate shifts the age structure so that working-age adults outnumber dependents. With fewer children to support, households and governments can save and invest more, boosting economic growth if jobs exist.
Question 47Unit 3
A densely populated delta region is subsiding while sea levels rise. Which combination best describes the resulting change in hazard exposure?
- Higher flood risk because relative sea level rises faster Correct answer.
- No change because subsidence and sea level offset each other
- Lower flood risk because subsidence drains the land
- Lower storm surge risk because the coast is built up
Explanation
Land subsidence lowers the surface while sea level rises, so relative sea level increases faster than either process alone. This raises the frequency and depth of flooding and storm surge in the delta.
Question 48Unit 3
Two regions have the same total population, but one has a much higher crude death rate. Which explanation is most consistent with this difference?
- The region with the higher rate has more births each year
- The region with the higher rate has higher net immigration
- The region with the higher rate has an older age structure Correct answer.
- The region with the higher rate has a younger age structure
Explanation
Because the crude death rate is not adjusted for age, a population with many elderly residents records more deaths per 1000 people. The difference can therefore reflect age structure rather than worse health care.
Question 49Unit 3
A government restricts emigration of skilled workers. Which outcome is most likely in the short term?
- An increase in return migration of retirees
- A rise in the number of refugees
- A reduction in the loss of human capital Correct answer.
- An increase in remittances from abroad
Explanation
Restricting the departure of skilled workers retains trained professionals who would otherwise leave, slowing the brain drain. Remittances, however, usually fall because fewer workers are abroad to send money home.
Question 50Unit 3
A country's total fertility rate has fallen to 1.6, well below replacement level, yet its population continues to grow for several decades. Which explanation best accounts for this?
- Birth rates are measured incorrectly
- Net migration is always negative in such countries
- Mortality rates have risen sharply
- The age structure still contains many people of childbearing age Correct answer.
Explanation
Population momentum means that even with below-replacement fertility, a young age structure keeps the number of births high for a time. Births still exceed deaths until the large cohorts pass through and the age structure ages.