Population Growth

Correct answer: C. It may become rapid

Direct answer: C, population growth may become rapid. A high birth rate means that many births occur during a given period, adding more people to the population. If the death rate and migration do not offset this addition, the population can grow quickly. Option C is correct because it states the general likely effect, not an absolute result in every situation. Option A is not the usual result of a high birth rate when other factors are unchanged. Option B is not necessarily correct because stability requires additions and removals to balance. Option D is not generally correct because a high birth rate adds people, although a very high death rate or large outward migration could change the final outcome. Birth rate must therefore be studied with death rate and migration. Memory cue: high births tend to push population upward, but the final result depends on all components.

Correct answer: B. Ten years

The direct answer is B: decadal population growth refers to growth over ten years. A decade is a period of ten years, and “decadal” means related to one decade. To understand the term step by step, first identify the unit: one decade = ten years. Then identify the measurement: decadal growth measures the change in population during that ten-year interval, often between two census dates. The change may be stated as an actual number or a percentage, but the time span remains ten years. Option A, five years, is half a decade. Option B, ten years, is correct. Option C, fifteen years, is longer than one decade. Option D, twenty years, represents two decades, not one. The word “deca” is a useful clue because it is associated with ten. Memory cue: decade and दशकीय both point to ten years.

Correct answer: A. The actual difference between the populations at two times

The direct answer is A: absolute population growth shows the actual difference between the populations at two times. “Absolute” means the actual numerical amount, not a percentage or rate. To calculate it, subtract the earlier population from the later population: absolute growth = later population − earlier population. For example, if a town has 20,000 people at one time and 23,000 later, its absolute growth is 3,000 people. Option A is correct because it describes this difference. Option B concerns measurement of distance or area and has no connection with population change. Option C is not a population measure at all. Option D may describe cultural diversity, but it does not show how many people were added or lost. Do not confuse absolute growth with growth rate: absolute growth is a number of people, whereas a rate commonly expresses change relative to the earlier population, often as a percentage. Memory cue: absolute growth answers “how many people changed?”

Correct answer: A. The population increased

The direct answer is A: the population increased. Compare the earlier number with the later number. The village first had 1,000 people and later had 1,100 people. Because 1,100 is greater than 1,000, the change is positive. The amount of increase is 1,100 − 1,000 = 100 people. Option A is correct because it states the direction of change. Option B would be correct only if the later population were less than 1,000. Option C is clearly wrong because the later population is 1,100, not zero. Option D is unrelated: a change in the number of people does not mean that the physical area of the village has ended. The example demonstrates a basic rule of population growth: final population greater than initial population means increase; final population smaller than initial population means decrease; equal values mean no numerical change. Memory cue: compare final with initial, then subtract initial from final.

Correct answer: B. Population decline

The direct answer is B: population decline. First compare the two numbers. The final population is 2,800 and the initial population was 3,000. Subtracting gives 3,000 − 2,800 = 200, so the population has decreased by 200 people. A decrease in the number of people is called population decline or population decrease. Option A is wrong because population growth means that the final number is greater than the initial number. Option B is correct because the final number is lower. Option C is wrong because zero population growth means there is no net change, such as 3,000 remaining 3,000. Option D is wrong because the population has not increased rapidly; it has fallen. Memory cue: final number lower means decline, equal means zero growth, and higher means growth.

Correct answer: A. Schools and teachers

The direct answer is A: schools and teachers. When the population grows, the number of children and young people may also increase. More learners require places to study, so the government and communities may need to build more schools, add classrooms, provide books, and appoint more teachers. Option A is correct because schools and teachers are direct parts of education provision. Option B is wrong because the sea is not an education service required by growing numbers of students. Option C is wrong because mountains are physical landforms, not educational facilities or staff. Option D is wrong because weather is a natural condition and cannot replace a school or teacher. Population growth does not automatically produce equal access to education, but it can increase demand and make educational planning more important. Memory cue: more students usually mean more classrooms and teachers.

Correct answer: A. More job opportunities may be needed

The direct answer is A: more job opportunities may be needed. As population grows, the number of people who may seek work can also increase. Governments and businesses may therefore need to create or support more employment, training, and livelihood opportunities. Option A is correct because it describes a possible planning requirement. Option B is wrong because population growth does not remove the need for work; it may increase it. Option C is wrong because a larger population does not guarantee that every person will automatically find a job. Employment depends on skills, available work, investment, and economic conditions. Option D is wrong because employment is work or a means of earning a living, while weather describes atmospheric conditions. The word “may” is important: population growth creates possible pressure on employment, but its exact effect depends on economic planning. Memory cue: more potential workers require more jobs and skills training.

Correct answer: A. Resource use and waste may increase

The direct answer is A: resource use and waste may increase. A larger population may need more water, food, energy, land, housing, transport, and other goods. Producing and using these things can create more solid waste, sewage, and emissions. If these are not managed properly, air, water, and soil pollution may increase. Option A is correct because it describes a possible environmental pressure, not an unavoidable result in every place. Option B is wrong because forests are limited ecosystems and may be reduced when land is cleared. Option C is wrong because people continue to need water, and a larger population generally increases total demand. Option D is wrong because pollution does not automatically become zero; careful planning and waste management can reduce it. Memory cue: more people often mean greater demand, and greater demand can create more waste unless resources are managed wisely.

Correct answer: A. Planning services may become easier

The direct answer is A: planning services may become easier. When population increases slowly, the number of additional people needing schools, hospitals, houses, water supply, transport, and other services may be more manageable over time. This gives planners more opportunity to estimate demand and provide facilities in an organised way. Option A is correct because it states a possible administrative benefit, not a guarantee that planning will always be perfect. Option B is wrong because slow population growth does not stop services; services continue to operate. Option C is wrong because population can still be counted through records and censuses. Option D is wrong because resources do not automatically disappear because growth is slow. In fact, slower growth may reduce pressure on some resources, although careful management is still necessary. Memory cue: slower growth can make rising demand easier to manage.

Correct answer: A. By increasing awareness and understanding of family planning

The direct answer is A: education can increase awareness and understanding of family planning. Education helps people learn about health, responsible decision-making, the spacing of births, and the consequences of different family-size choices. With accurate information and access to voluntary health services, families can make informed decisions about the number and spacing of children. Option A is correct because it describes an awareness-based and rights-respecting pathway. Option B is wrong because education is not intended to increase deaths, and higher mortality is not a responsible population policy. Option C is wrong because stopping the census only removes information; it does not change births or population conditions. Option D is wrong because migration is movement of people and making it impossible is neither the meaning nor the normal role of education. Education alone does not guarantee a particular population result, but it can support informed choices. Memory cue: education informs decisions; it does not force them.

Correct answer: A. Census

The direct answer is A: census. A census is an organised official counting and collection of information about the population at a particular time. Comparing census results from different years helps us see whether the population has increased, decreased, or changed in its distribution and composition. Option A is correct because census data are collected through an official statistical process. Option B is wrong because a storybook is written for narrative or literary purposes and is not an official population record. Option C is wrong because a song collection does not provide systematic demographic counts. Option D is wrong because a painting is an artistic work, not a statistical source. A census may be conducted at intervals, so other official surveys and records can also provide demographic information, but among these options the census is clearly the appropriate answer. Memory cue: census means an official population count.

Correct answer: A. Slow or stable

The direct answer is A: growth may be slow or nearly stable. Natural population growth depends mainly on the difference between the birth rate and the death rate. When both rates are low, births and deaths may be close in number, so the difference is often small. A small difference produces slow growth or a population that is almost stable. Option A is correct because it allows both possibilities. Option B is wrong because very rapid growth generally requires births to be much higher than deaths, not simply that both rates are low. Option C is wrong because low birth and death rates do not always produce a decrease; the population can still grow if births are slightly higher than deaths. Option D is wrong because the relationship gives useful information about likely natural growth, although migration can also affect the final population. Memory cue: compare birth rate with death rate, not just whether each rate is labelled low.

Correct answer: A. Population growth is always measured with reference to a specific time period

The direct answer is A. Population growth means the change in the population of a place between two times, so a time period is essential. We may compare a beginning population with a later population after one year, ten years, or another clearly stated interval. In simple form, change equals later population minus earlier population; a growth rate also relates this change to the starting population and the period. Option A is correct because it identifies the required time reference. Option B is wrong because growth cannot be described without comparing times. Option C describes the population at one instant, which is population size at that time, not growth. Option D is wrong because the same numerical change can mean different growth rates over different periods. Memory cue: population size is a snapshot; population growth is a change between dates.

Correct answer: A. So change can be compared with base population

The direct answer is A. A percentage expresses a change in relation to a base amount, treating the base as 100 parts. In population studies, the starting or previous population is the base. The basic formula is: percentage growth = (increase in population ÷ original population) × 100. This allows fair comparison between places of different sizes. For example, an increase of 100 people is 10% of a population of 1,000 but only 1% of a population of 10,000. Option A is correct because it explains why the base population matters. Option B is wrong because area is measured in square units such as square kilometres. Option C is wrong because river length is measured in distance units such as kilometres. Option D has no connection with population growth. Memory cue: percentage means “out of the original 100.”

Correct answer: A. Birth rate is high and death rate is low

The direct answer is A. Rapid natural population growth is most likely when many people are being added through births and relatively few are being removed through deaths. In simple terms, natural increase equals birth rate minus death rate. A high birth rate combined with a low death rate creates a large positive difference, so population can rise quickly. Option A is correct because both conditions push the number upward. Option B is wrong because low births and high deaths usually produce slow growth, no growth, or decline. Option C is wrong because continuous movement out of an area is out-migration, which reduces that area’s population, although immigration elsewhere may increase another area’s population. Option D is wrong because if births and deaths are both absent, natural increase is zero; this does not create rapid growth. Migration can also affect total growth, but among the given choices A is the clear answer. Memory cue: many added, few removed means rapid growth.

Correct answer: A. Deaths and out-migration are high

The direct answer is A. Population can decrease when removals are greater than additions. Deaths remove people from the population, and out-migration removes people from the area by sending them elsewhere. If these losses are high and are not balanced by births or in-migration, the total population falls. Option A is correct because it gives two forces that reduce population. Option B is wrong because births and in-migration add people and usually cause an increase. Option C is wrong because a birth rate higher than the death rate produces positive natural increase, at least before migration is considered. Option D is wrong because more in-migration than out-migration gives a positive migration balance and tends to increase population. The complete idea is: change = births + in-migration − deaths − out-migration. Memory cue: births and in-migration enter the plus side; deaths and out-migration enter the minus side.

Correct answer: A. Crowding and housing pressure

The direct answer is A: crowding and housing pressure. When the urban population grows, more people need homes, transport, water, sanitation, schools, health services, and employment. If infrastructure and planning do not expand fast enough, available housing may become insufficient, neighbourhoods may become crowded, rents may rise, and informal settlements may develop. Option A is correct because these are possible social and service pressures linked to urban population growth. Option B is wrong because river flow mainly depends on rainfall, water supply, slope, and the river channel; it is not directly defined by population growth. Option C is wrong because soil colour is a physical characteristic and is not an urban population problem. Option D is wrong because mountain height is a landform feature that does not normally change because a city’s population increases. The word “can” is important: good planning may reduce the severity, but the pressure remains a possible effect. Memory cue: more urban residents require more homes and services.

Correct answer: A. Planning future services

The direct answer is A: planning future services. Population-growth information tells the government how the number and needs of people may change. Using such information, planners can estimate future requirements for schools, hospitals, housing, drinking water, sanitation, roads, public transport, food distribution, and employment programmes. The information does not give a perfect prediction, but it supports evidence-based planning and helps resources reach the people who need them. Option A is correct because services must be planned according to present and expected population. Option B is wrong because population data cannot change the colour of the sea. Option C is wrong because removing mountains is a geological or engineering matter, not the normal purpose of population statistics. Option D is wrong because clouds and sound have no logical connection with population planning. Memory cue: population data helps answer “how many people will need which services, and where?”

Correct answer: A. Size is the number at one time, while growth is the change over time

The correct answer is A: population size is the number of people present at a particular time, whereas population growth is the increase or decrease in that number over a period. For example, if a town has 20,000 people in a given year, 20,000 is its population size at that time. If it has 22,000 people five years later, the change of 2,000 represents growth. Growth is affected by births, deaths, immigration, and emigration. Option A is correct because it separates a population’s amount from the change in that amount. Option B is wrong because population concepts describe people, not weather. Option C is wrong because birth rate is only one factor affecting growth, and a river is unrelated. Option D is wrong because size and growth answer different questions: “How many people are there?” and “How has the number changed?” Memory cue: size is a snapshot; growth is a moving change.

Correct answer: A. The time period

The correct answer is A: the time period. To compare population growth fairly, we should observe the change in two populations over the same length of time, such as five years or ten years. If one place is measured for ten years and another for only two years, the comparison may be misleading because the first place has had more time to change. Initial population, density, and area may be useful when calculating or interpreting growth, but they do not replace an equal time period. Option A is correct because growth is a change measured across time. Option B is wrong because two areas can begin with different populations and still be compared if the period and measure are clearly stated. Option C is wrong because density means people per unit area, not the time over which growth occurs. Option D is wrong because area is not the basic condition for comparing change in population. Memory cue: before comparing growth, first compare the number of years.

Correct answer: A. Absolute growth

The correct answer is A: absolute growth. Absolute growth is the actual numerical increase or decrease in population during a stated period. The calculation is: absolute growth = new population − old population. For example, if a district has 50 lakh people at the beginning and 56 lakh at the end, its absolute growth is 6 lakh people. The values must use the same unit. Option A is correct because subtraction gives the actual difference in population, not a rate or ratio. Option B is wrong because density requires population divided by area. Option C is wrong because sex ratio compares the numbers of females and males according to the stated convention. Option D is wrong because death rate measures deaths in relation to population and time; it is not found by subtracting two population totals. Also, a negative result would show an absolute decline rather than an increase. Memory cue: new minus old tells the numerical change.

Correct answer: A. It explains the number of people, their needs, and planning

The correct answer is A: the study explains the number of people, their needs, and planning. Population growth is not merely a count; it helps us understand how the number of people changes and how that change affects food, water, housing, schools, hospitals, transport, employment, and other resources. Governments and communities use population information to estimate demand and plan services more fairly. Option A is correct because it connects population knowledge with human needs and development planning. Option B is wrong because drawing may be a useful classroom skill, but it is not the purpose of studying population growth. Option C is wrong because sea depth belongs mainly to physical or marine geography, not this basic population concept. Option D is wrong because a mountain’s sound is unrelated to population measurement or planning. Memory cue: population study helps answer three questions—how many people, what they need, and how to plan for them.

Correct answer: A. Understanding change in population over time

The correct answer is A: understanding change in population over time. Population growth means the increase or decrease in the number of people during a period. To understand it, first identify the population at an earlier time, the population at a later time, and the length of the period between them. Births, deaths, immigration, and emigration can produce this change. Option A is correct because it gives the central idea from which calculations and further topics develop. Option B is wrong because weather is a separate geographical subject and does not define population growth. Option C is wrong because mountains are physical features, not the meaning of population change. Option D is wrong because soil colour is unrelated to the basic definition. A useful memory cue is “people plus time plus change”: population growth always involves people, a time interval, and a change in number. Do not confuse population size, which is a number at one time, with population growth, which is the change across time.

Correct answer: A. Rapid

The correct answer is A: rapid. Natural increase depends mainly on the balance between births and deaths. When many people are born and relatively few people die, births exceed deaths, so the population can increase quickly, provided other factors do not offset the increase. Option A is correct because a large positive difference between births and deaths creates the possibility of rapid natural growth. Option B is wrong because zero growth would mean that additions and losses balance, which is not suggested by high births and low deaths. Option C is wrong because negative growth means losses exceed additions, the opposite of the stated birth-death pattern. Option D is wrong because births and deaths are directly related to population change. The word “can” is important: migration and the exact rates may also affect total population growth. Memory cue: high births plus low deaths creates a wide positive gap and usually points toward rapid natural increase.

Correct answer: A. The population may increase

The correct answer is A: the population may increase. People who move into a city from another place are in-migrants, and their arrival adds residents to the city. Employment opportunities are one possible reason for such movement. If the number of people arriving is greater than the number leaving or dying, the city’s population will rise. Option A is correct because work-related in-migration can add people, although the word “may” allows for other factors that are not given. Option B is wrong because receiving workers does not mean the population must decrease. Option C is wrong because migration for work cannot automatically reduce a city’s population to zero. Option D is wrong because a change in population does not automatically change the physical area of the city. It may affect crowding or density, but area is a separate measurement. Memory cue: people entering add to population; people leaving subtract from it. Always consider both movements before making a definite statement.