Population – Case-based Questions with Answers
Class 9
Social Science — Geography
Chapter 6: Population
Geography: Contemporary India – I
20 Case-Based Questions & Model Answers — NCERT-aligned for CBSE Class 9 revision and exam practice.
CBSE Board Exam Focus — What this set targets
- Apply NCERT concepts to short case scenarios
- Practice reasoning: causes, effects, simple calculations (density)
- Build skills for data- or scenario-based questions in board exams
Topic-wise Case-Based Questions (20)
Topic 1 — Population Size (4 cases)
Case 1 — A district reports rapid rise in population totals over two decades. The local planner must allocate funds for schools and health centres.
Q1.1: Which demographic components should the planner examine first to understand the rise?
A: Birth rate (fertility), death rate (mortality) and migration (net in- or out-migration). These explain natural increase and movement-driven change.
Q1.2: If birth rate declined but population still rose, what is a likely explanation?
A: Declining death rates (improved healthcare) or high in-migration. The planner should check CDR and migration data.
Case 2 — A small town’s recorded population doubled in 25 years. Officials want to know whether to treat it as temporary or permanent growth.
Q2.1: What additional data helps distinguish temporary from permanent growth?
A: Migration duration (seasonal vs permanent), age-sex structure (working-age influx indicates migration), and infrastructure expansion (housing/building permits).
Q2.2: How would high temporary (seasonal) migration affect service planning differently from permanent settlement?
A: Seasonal influx needs flexible or temporary services (health camps, seasonal water supply), while permanent settlement requires long-term schools, housing and sanitation investments.
Case 3 — National census shows population increases but slower growth rate compared to previous decade.
Q3.1: Suggest two likely demographic trends responsible for slower growth rate.
A: Declining fertility (lower birth rates) due to family planning and rising female education; continued reduction in death rate reaching a plateau.
Q3.2: Why is this slowdown important for long-term planning?
A: It affects future workforce size, pension planning, education demand and potential timing of demographic dividend — requiring policy adjustments.
Case 4 — A rural panchayat reports fewer births than expected though healthcare improved.
Q4.1: Provide two plausible social reasons for lower births despite better healthcare.
A: Increased female education and delayed marriage; greater use of family planning methods and changing preferences for smaller families.
Q4.2: How would you verify these causes quickly?
A: Check female literacy/enrolment rates, average age at marriage, contraception prevalence and local family planning program records.
Topic 2 — Distribution by Numbers (4 cases)
Case 5 — A map shows dense dots along a river valley and almost no dots in nearby mountains.
Q5.1: List three reasons why population concentrates in river valleys.
A: Fertile soils for agriculture, reliable water supply for irrigation and domestic use, and easier transport/communication corridors.
Q5.2: Give one example of how this concentration influences local economy.
A: High agricultural productivity supports market towns, agro-processing industries and denser rural settlements with diversified livelihoods.
Case 6 — Coastal belt of a state shows towns and fishing villages densely clustered, while the interior shows scattered settlements.
Q6.1: Mention two human factors that explain coastal clustering.
A: Trade/ports and fishing-based livelihoods (economic pull) and historical settlement due to maritime trade routes.
Q6.2: What vulnerability should planners consider for coastal clusters?
A: Coastal hazards (storm surges, sea-level rise), overfishing, and pressure on marine/ecosystem resources — requiring disaster-risk planning and sustainable resource management.
Case 7 — A new industrial corridor is established; nearby rural settlements see incoming workers and small towns grow.
Q7.1: How does industrialization alter population distribution by numbers locally?
A: It creates pull factors causing in-migration, increases urbanization, and transforms rural settlements into peri-urban hubs.
Q7.2: Suggest two measures to manage the surge responsibly.
A: Plan affordable housing and basic services (water, sanitation) and invest in transport/health/education before major influxes occur.
Case 8 — A government wants to promote settlement in a sparsely populated hilly district to reduce pressure on plains.
Q8.1: Name two constraints to such resettlement efforts.
A: Difficult terrain and limited arable land; lack of infrastructure and harsh climate making farming and connectivity challenging.
Q8.2: Suggest one realistic policy to encourage balanced distribution.
A: Promote eco-tourism and small-scale horticulture with investment in rural roads and market access rather than large-scale migration incentives.
Topic 3 — Distribution by Density (5 cases)
Case 9 — State A has an average density of 1,000 persons/sq km, but large parts are low-density countryside with one metropolis at 20,000 persons/sq km.
Q9.1: Why is the average density misleading here?
A: The mean masks internal variation — a dense urban core and sparse rural hinterlands cancel out to give an average that hides local realities.
Q9.2: Which additional data would give clearer insight?
A: Urban vs rural density breakdown, district-level densities, population pyramid and settlement maps showing spatial distribution.
Case 10 — A planner calculates density using population 1,200,000 and area 600 sq km.
Q10.1: Compute the population density and state its interpretation.
A: Density = 1,200,000 ÷ 600 = 2,000 persons/sq km. Interpretation: The area is highly crowded; planners must consider urban services, housing and transport capacity.
Q10.2: What limitation remains even after knowing this density?
A: It does not reveal which parts of the 600 sq km are most crowded (e.g., central business district vs suburbs) or socio-economic conditions of residents.
Case 11 — A rural district shows low average density, but recent road projects are improving connectivity.
Q11.1: Predict short- and medium-term effects on density.
A: Short-term: slight in-migration for construction jobs; medium-term: higher density as market access and services attract settlers and businesses.
Q11.2: What planning priorities should accompany new roads?
A: Land-use zoning, water and sanitation provision, and support for local livelihoods to prevent unplanned sprawl.
Case 12 — An island district has limited land and rising population density each census.
Q12.1: Name two sustainable measures to manage density pressure on small islands.
A: Vertical housing solutions with resilient design and strict coastal/environmental zoning; promote off-island economic linkages to reduce local resource strain.
Q12.2: Why are such measures important for island livelihoods?
A: To avoid environmental degradation, protect fisheries/tourism assets, and maintain long-term habitability and food security.
Case 13 — Two districts have equal population but very different areas; one small and urban, another large and rural.
Q13.1: How will their densities compare, and what does this imply for service provision?
A: The small urban district will have high density requiring concentrated urban services; the large rural district will have low density requiring dispersed service strategies and higher per-capita infrastructure costs.
Topic 4 — Population Growth (4 cases)
Case 14 — A country shows falling death rates but birth rates unchanged, causing rapid growth.
Q14.1: Explain the stages of demographic reasons behind this.
A: Improved healthcare and sanitation reduce mortality first; fertility often declines later due to social and economic changes. The period between these shifts yields rapid natural increase.
Q14.2: What short-term policy should be prioritized?
A: Strengthen family-planning, expand education (esp. female) and scale up job creation to manage the rapid cohort entering working age.
Case 15 — A region's doubling time is estimated at 50 years at current growth rate.
Q15.1: What does doubling time of 50 years indicate?
A: At the present growth rate, the population will be about twice its size in roughly 50 years; it highlights long-term pressure on resources and services if growth remains unchecked.
Q15.2: Give one method to reduce future doubling speed.
A: Accelerate fertility decline through education, access to contraception, and delaying age at marriage.
Case 16 — Agricultural productivity rises due to irrigation; villages show improved survival and lower mortality.
Q16.1: How might this change population growth in that area?
A: Lower mortality increases natural growth initially; if fertility remains high, population will rise. Over time, improved livelihoods may reduce fertility, stabilizing growth.
Q16.2: What accompanying measures would balance benefits sustainably?
A: Invest in schooling, family planning, and livelihood diversification to convert productivity gains into long-term well-being rather than unchecked population pressure.
Topic 5 — Processes (Migration, Fertility, Mortality) (5 cases)
Case 17 — A coastal city sees seasonal migrant labour in fishing and tourism sectors every year.
Q17.1: Distinguish seasonal migration from permanent migration using this example.
A: Seasonal migrants move temporarily for work during peak seasons and return home; permanent migrants relocate residence and often settle families, changing long-term population distribution.
Q17.2: What service provision challenge is typical for seasonal influx?
A: Need for surge capacity in health, temporary shelter and water supply without investing in permanent infrastructure that might be underused off-season.
Case 18 — A district reports improved female literacy and lower fertility over a decade.
Q18.1: Explain the causal link between female literacy and fertility decline.
A: Literacy raises awareness of family planning, delays marriage, improves employment opportunities and health choices — all contributing to fewer births per woman.
Q18.2: What long-term demographic effect can be expected?
A: Slower population growth, improved child health and potential for a demographic dividend if employment grows.
Case 19 — An area with heavy out-migration sends remittances that improve local living standards but loses young workers.
Q19.1: State two social and two economic effects of this pattern.
A: Social: ageing local population and possible disruption of family structures. Economic: increased household incomes via remittances and reduced local labour supply affecting productivity.
Q19.2: Suggest one policy to maximise benefits of remittances.
A: Encourage local investment of remittances into micro-enterprises, education and community infrastructure through matched funding and financial literacy programs.
Case 20 — A government aims to reduce infant mortality in a backward district through vaccination and sanitation campaigns.
Q20.1: Predict short-term and long-term population implications of reduced infant mortality.
A: Short-term: fall in infant deaths raises population size slightly. Long-term: as child survival improves and social indicators (education, income) rise, fertility often declines, stabilizing population growth.
Q20.2: Why must health improvements be paired with family planning?
A: Without family planning, reduced mortality can temporarily accelerate growth and strain resources. Paired policies ensure sustainable demographic transition.
Tip: Use these cases to practice applying NCERT concepts. For exam answers, keep responses short, structured, and supported by one or two examples where possible.