Population Growth

Correct answer: A. Because the initial population is large

Correct answer: A. A percentage is applied to the starting population. Therefore, even a small rate can represent many people when the starting population is very large. For example, 1% of 100,000 is 1,000 people, while 10% of 1,000 is only 100 people. The first case has the lower percentage but the higher absolute increase. Option B is wrong because percentage is a useful comparative measure when calculated correctly. Option C is wrong because absolute growth can and should be calculated by subtracting the initial population from the final population. Option D is wrong because absolute growth is obtained by applying the rate to the population base. Memory cue: rate tells proportion; absolute growth tells people.

Correct answer: A. The time period should be the same

Correct answer: A. Decadal growth means population change measured over a ten-year period. For a fair comparison, the time intervals must be comparable—for example, one complete decade should be compared with another complete decade. If one figure covers ten years and another covers only five years, their growth cannot be compared directly without adjustment. Option B is not the basic requirement for calculating or comparing decadal growth. Option C relates to drainage, not population measurement. Option D is a cultural characteristic and is not the time basis of growth. Also check whether the same definition, area and population base are being used. Memory cue: ‘decadal’ means decade, so first check the ten-year period.

Correct answer: B. No, if the growth rate remains positive, the total population may still increase

Direct answer: B is correct. A declining growth rate means that the speed of population increase is becoming slower; it does not automatically mean that the number of people is falling. Suppose a population grows by 3% in one year and by 1% in the next year. The second increase is smaller, but 1% is still positive, so the total population continues to rise. Population decreases only when the overall or net growth rate becomes negative, meaning losses through deaths and out-migration are greater than additions through births and in-migration. A is wrong because a lower positive rate still adds people. C is wrong because growth rate depends on several factors, not only births, and it need not mean zero births. D is wrong because growth rate directly describes population change. Memory cue: positive means “more,” zero means “no net change,” and negative means “less.”

Correct answer: A. Population growth can increase the number of job seekers

Direct answer: A is correct. Population growth can increase the number of people who eventually enter the working-age group and seek employment. This creates a larger potential labour force. However, population growth by itself does not create enough jobs; employment opportunities must grow through economic activity, skills, investment, and suitable planning. B is wrong because more people generally create continued or greater need for work and income. C is wrong because population size and age structure influence the number of potential workers and job seekers. D is wrong because growth does not guarantee a job for every person; if jobs grow more slowly than the labour force, unemployment or underemployment may rise. The word “can” in A is important: it states a possible effect, not an unavoidable result. Memory cue: more working-age people may mean more workers and also more competition for jobs.

Correct answer: A. Pressure of unemployment

Direct answer: A is correct. Rapid population growth can increase the number of people entering the working-age group and looking for work. If employment opportunities grow more slowly, the economy may not absorb all job seekers. This creates pressure of unemployment, and some people may also experience underemployment, where they work fewer hours or below their skill level. B is wrong because population growth does not make land, water, or other resources infinite. C is wrong because a difference between population growth and job growth cannot make the population suddenly zero. D is wrong because more people generally maintain or increase the need for houses and living space. The result is not automatic in every place, because education, migration, investment, and policy can affect employment, but A is the clear possible problem. Memory cue: when workers grow faster than jobs, unemployment pressure rises.

Correct answer: A. Pressure on agricultural land

Direct answer: A is correct. Many rural households depend substantially on agricultural land for food, work, and income. If the rural population grows rapidly while cultivable land remains limited, more people may depend on the same land. Average holdings may become smaller through division, competition for land may increase, and demand for soil and water may become greater. This is why pressure on agricultural land is a possible effect; it is not claimed to happen identically everywhere. B is wrong because a rural population increase does not directly or necessarily reduce sea trade. C is wrong because population growth does not cause glaciers to expand. D is wrong because a larger population does not automatically stop a river’s flow, although human use can affect water availability in some situations. Memory cue: more rural people sharing limited farmland means greater land pressure.

Correct answer: A. The number of births may remain high in the future

Direct answer: A is correct. A population with a large share of young people contains many individuals who may enter childbearing ages over time. Even if the birth rate per woman begins to fall, the total number of births can remain substantial because there are many potential parents. This continuing effect is related to population momentum. A says “may,” so it correctly describes a possible demographic effect rather than an absolute rule. B is wrong because a young population does not make the total population suddenly zero. C is wrong because a young age structure does not mean the death rate must always rise; death patterns depend on many conditions. D is wrong because young people can still move within or between regions. Memory cue: a large young base can keep growth going for some time, like a moving object that does not stop instantly.

Correct answer: A. Growth continuing due to a large young population even after the birth rate falls

Direct answer: A is correct. Population momentum is the tendency for population growth to continue for some time after fertility or the birth rate has started to decline. The main reason is age structure: a large number of young people may soon enter the ages when they can have children. Even if each person has fewer children than earlier generations, the large number of potential parents can keep the total number of births high for a period. B is the opposite of the idea and is therefore wrong. C is wrong because momentum does not mean that deaths always increase. D is wrong because momentum is about the effect of age structure on future births, not about migration stopping. Momentum means continuation caused by an existing structure, not unlimited growth forever. Memory cue: a young population can keep moving forward even after birth rates begin to slow.

Correct answer: A. Rapid natural increase may occur

Direct answer: A, rapid natural increase may occur. Population change has two parts: natural change and migration. Natural increase is calculated by subtracting the death rate from the birth rate: natural increase = birth rate − death rate. If the birth rate remains high while the death rate falls, more people are being born than are dying, so the difference becomes positive and possibly large. For example, if the birth rate is 30 per thousand and the death rate is 10 per thousand, natural increase is 20 per thousand. B is wrong because a high birth rate with a lower death rate does not normally cause decline. C is wrong because natural increase is zero only when birth and death rates are equal. D is wrong because actual population growth can still be measured by considering births, deaths and migration. Memory cue: high births plus low deaths means faster natural increase.

Correct answer: A. It may help reduce birth rate

Direct answer: A, increased education and awareness may help reduce the birth rate. Education helps people understand health, the timing and spacing of children, family planning, and the economic and social effects of very large families. Awareness also helps people make informed decisions and use available health services. Therefore, education and awareness can support smaller, planned families and may gradually lower the birth rate; they do not automatically produce the same result everywhere. B is wrong because education does not mean the death rate will always increase; better knowledge may support healthier choices. C is wrong because population counting continues independently of education. D is wrong because migration is movement of people and cannot become impossible merely because education rises. The key link is education and awareness → informed family decisions → possible reduction in birth rate and slower population growth.

Correct answer: A. It can increase family planning awareness

Direct answer: A, female education can increase awareness of family planning. Education gives girls and women better access to information about health, nutrition, reproductive choices, and the spacing of children. It can also strengthen participation in household decisions and help people evaluate the responsibilities and costs connected with family size. These factors may contribute to planned families and a slower rate of population growth, although education alone does not determine every family’s decision. B is wrong because female education does not always increase the birth rate; it may instead support informed choices that reduce or space births. C is wrong because education can influence health, work, decision-making and family practices, so it has social effects. D is not meaningful: a death rate is a demographic measure, while area is a measure of land. Memory cue: educated and informed families are better able to plan the number and spacing of children.

Correct answer: A. Because death rate may decrease

Direct answer: A, because improved health services may reduce the death rate. Hospitals, vaccination, medical treatment, disease prevention, safer childbirth and better public health can help more people survive illnesses and live longer. If the birth rate remains higher than the death rate, the gap between births and deaths becomes larger, so natural increase can become faster. The word “may” is important: health improvement does not by itself guarantee rapid population growth, because birth rates can also change and migration may affect total growth. B is wrong because better health services do not make births zero. C is wrong because population counting is still possible and is unrelated to the mechanism described. D is wrong because health improvement does not automatically stop migration. Memory cue: better health commonly lowers deaths first; if births remain high, population growth can accelerate.

Correct answer: A. Because in-migration adds people

Direct answer: A, because in-migration adds people to the receiving area. Total population change is affected by births, deaths, immigration or in-migration, and emigration or out-migration. Natural increase is birth rate minus death rate, but actual or total growth also includes the balance of migration. Thus, even if a place has a low birth rate and its natural increase is small or negative, a large number of newcomers can make the total population rise. B is wrong because a low birth rate still has demographic meaning and affects natural increase. C is wrong because in-migration does not require the death rate to be zero. D is wrong because the size of the land area does not itself add people. The important distinction is natural increase versus total population growth. Memory cue: people born minus people dying is natural change; people entering minus people leaving is migration change.

Correct answer: A. When in-migration is high and natural increase is low

Direct answer: A, when in-migration is high and natural increase is low. City population can grow through natural increase, which results from births being greater than deaths, or through migration, which occurs when people move into the city. If the natural increase is small but many people arrive from other places, migration is the main source of the city’s growth. B is wrong because high births with zero migration describes growth mainly through natural increase, not migration. C is wrong because high deaths and no in-migration would not normally produce migration-based growth and could reduce population. D is wrong because an increase in land area without an increase in people is not population growth. Memory cue: identify the source—births minus deaths means natural growth; arrivals minus departures means migration growth.

Correct answer: A. Population and service demand may increase in cities

Direct answer: A, population and demand for services may increase in cities. Urbanisation means a growing share of people lives in towns and cities, often because of migration, employment, education, or other opportunities. When the urban population increases, cities generally need more housing, drinking water, transport, schools, hospitals, sanitation, energy and jobs. Population growth can therefore increase the pressure on urban facilities, while urbanisation can also attract more people and further enlarge cities. B is wrong because urbanisation usually refers to increasing urban population, not cities becoming empty. C is wrong because urbanisation is directly related to where people live and work. D is wrong because population growth can occur in villages, towns and cities, not only forests. Memory cue: more urban residents means greater demand for urban services and infrastructure.

Correct answer: A. Sanitation and environmental pressure will increase

Direct answer: A, sanitation and environmental pressure will increase. Rapid population growth means more people are producing household, market and other types of waste. If collection, segregation, treatment and safe disposal are weak, waste can accumulate and create greater sanitation and environmental problems. It may affect cleanliness, attract pests, pollute land and water, and increase the difficulty of protecting public health; the exact effects depend on local conditions. B is wrong because waste does not disappear automatically and requires proper management. C is wrong because weak waste management does not itself guarantee population decline. D is wrong because a growing population usually needs more, not fewer, public services. The practical lesson is that population growth should be accompanied by planned sanitation, waste reduction, collection and safe disposal. Memory cue: more people plus weak management means more waste pressure.

Correct answer: A. When water sources are limited

Direct answer: A, when water sources are limited. Population growth adds people, and people need water for drinking, cooking, washing, sanitation, farming, industry and other activities. The reasoning is: more people usually increase demand; if the available water supply is restricted, the gap between demand and supply becomes larger. This can create scarcity, competition and water stress, depending on rainfall, storage, infrastructure, consumption patterns and management. B is generally wrong for this question because abundant sources can reduce pressure, although careless use can still create local problems. C is wrong because a decreasing population generally lowers total demand, if other conditions remain similar. D is wrong because water pressure cannot result when there is truly no demand. Memory cue: pressure is greatest when demand rises while supply is limited.

Correct answer: A. When child population and growth are both high

The direct answer is A: pressure on education services will be greatest when both the child population and population growth are high. Education services include schools, classrooms, teachers, books, transport and other learning facilities. A large number of children creates high demand, while rapid growth may add even more children in the future. If facilities do not expand at the same pace, classrooms may become crowded, teachers may be overburdened and some children may have less access to schooling. Option A is correct because it combines a large immediate need with continuing additional demand. Option B is wrong because no children means almost no demand for school education. Option C is wrong because having more schools than needed means pressure is low, not high. Option D is wrong because a declining population generally reduces future demand for schools. Memory cue: child population plus growth means rising school demand.

Correct answer: A. Growing population increases demand for hospitals and health workers

The direct answer is A: population growth generally increases the demand for hospitals and health workers. Health planning means estimating how many people need clinics, hospitals, medicines, vaccination, emergency care and trained staff, and then arranging those resources. As the number of residents rises, existing facilities may become crowded and waiting times may increase if capacity does not expand. Option A is correct because planning must consider both the size of the population and its health needs. Option B is wrong because population size strongly affects the scale of health services required. Option C is the opposite of reality: more people usually require more, not fewer, facilities. Option D is wrong because weather can influence some health conditions, but health planning also depends on population, disease patterns, location, income, transport and available resources. Memory cue: more people require planned health capacity.

Correct answer: A. Because total population may still be increasing

The direct answer is A: total population can continue to increase even when its growth rate becomes lower. A growth rate describes the speed of change, while total population is the actual number of people. For example, if a population of 1,000 grows by 5%, it gains 50 people; if it later grows by 2%, it still gains 20 people. The increase is smaller, but the total population is still rising. Option A is correct because a positive rate, even a declining one, adds people. Option B is wrong because a low rate does not mean zero population; it means slower growth. Option C is wrong because schools, hospitals, water and transport serve people, so demand is related to population size. Option D is wrong because a declining rate is not necessarily negative. Memory cue: lower speed is not the same as moving backward.

Correct answer: A. A very large initial population

The direct answer is A: a very large initial population can produce high absolute growth even when the percentage growth rate is low. Absolute growth means the actual number added, calculated as final population minus initial population. Growth rate compares that increase with the initial population and expresses it as a percentage. For example, 1% growth on 1,000,000 people adds 10,000 people, which is a large number even though the rate is small. Option A is correct because a large base magnifies the numerical increase. Option B is wrong because the same low percentage on a small base usually adds fewer people. Option C is wrong because zero growth means no numerical increase. Option D is wrong because a decline means the population decreases. Memory cue: percentage uses the base; a large base can create a large absolute change.

Correct answer: A. Because the initial population is very small

The direct answer is A: a small initial population can show a high percentage growth rate even when only a small number of people are added. Growth rate is calculated relative to the starting population. For instance, an increase from 100 to 110 is an absolute gain of only 10 people but a growth rate of 10%. If a large population gained 10 people, its percentage rate would be much lower. Option A is correct because a small denominator makes a modest numerical increase appear large as a percentage. Option B is wrong because a large starting population usually produces a lower percentage for the same small increase. Option C is wrong because zero growth produces neither a positive rate nor an increase. Option D is wrong because area and birth rate are different concepts: area measures space, while birth rate measures births relative to population. Memory cue: small base, big percentage.

Correct answer: A. It gives official population figures for different years

The direct answer is A: a census provides official population data for a particular time, and repeated censuses allow comparison across years. By comparing population totals, age groups, births, deaths or distribution where such data are collected, researchers and planners can study whether population is growing, stable or declining. This information helps plan schools, hospitals, housing, transport and other services. Option A is correct because census data provide a reliable population base for measuring change. Option B is wrong because weather observation is a different activity. Option C is wrong because a census records people and related demographic information; it does not alter rivers. Option D is wrong because recording population cannot change physical mountain height. Memory cue: census counts people; comparison of counts reveals growth.

Correct answer: A. Because a boundary change can alter the basis of comparison

The direct answer is A: a clear and consistent territorial boundary is needed because changing the boundary can change both the area being studied and the population included in it. If people or settlements are added to, or removed from, a region between two measurements, the apparent growth may reflect the boundary change rather than actual demographic change. For a fair comparison, the same geographical unit should be used, or the effect of any boundary change should be adjusted and explained. Option A is correct because it protects the comparison base. Option B is wrong because the people counted depend on the boundary. Option C is meaningless and factually false. Option D is wrong because population change can also involve deaths and migration, not only births. Memory cue: same boundary, fair comparison.

Correct answer: A. When data for one area cover ten years and data for another area cover five years

The direct answer is A: comparison becomes misleading when one area is measured over ten years and the other over only five years. Decadal growth refers to change over a ten-year period, so both places must be compared over equivalent time intervals and, where possible, with consistent definitions and boundaries. Otherwise one figure has more time in which change can occur, making the comparison unfair. Option A is correct because the time bases differ. Option B is wrong because the same ten-year period supports a valid comparison. Option C is wrong because comparable census data improve the reliability of the comparison. Option D is wrong because the same population definition also makes comparison more consistent. Memory cue: before comparing growth, check the same years, area and definition.