GeographyCBSE Class 12 · The World Population: Distribution, Density and Growth

Factors Influencing the Distribution of World Population (Class 12 Geography, Chapter 2)

Updated 15 October 2026 · Fact-checked

World population is uneven: about 90 per cent of people live on about 10 per cent of the land. Three groups of factors explain this: geographical (water, landforms, climate, soils), economic (minerals, urbanisation, industrialisation) and social-cultural (religious or cultural importance, unrest, government incentives). Density is population divided by area, in persons per sq km.

Remember three groups of factors, with two or three examples each, to explain why people are spread unevenly over the earth.

Illustration drawn for QuestionBuddy.

Understand Factors Influencing World Population Distribution

Why this topic matters. This is the most tested part of Chapter 2: matching places to factors, assertion-reason on river valleys or deserts, and 3- or 5-mark 'explain the factors' questions. Learn the three groups, two or three factors in each, and one NCERT example per factor.

1. Distribution and density.

Distribution is the way people are spaced over the earth's surface.
The pattern is very uneven: roughly 90 per cent of people live on about 10 per cent of the land.
The 10 most populous countries hold about 60 per cent of world population, and 6 of them are in Asia.
George B. Cressey's remark on Asia, that it has many places with few people and few places with very many people, fits the whole world.
Density compares people with land, because each unit of land can support only a limited number of people:

$Density = \frac{Population}{Area} (persons per sq km)$

2. Geographical factors.

Availability of water: the most important need for life; water serves drinking, bathing, cooking, cattle, crops, industry and navigation. So river valleys are among the most densely populated areas.
Landforms: flat plains and gentle slopes suit crops, roads and industries; mountains hinder transport and initially discourage farming and industry. The Ganga plains are among the most crowded areas; the Himalayan mountain zones are thinly peopled.
Climate: very hot or very cold deserts and areas of very heavy rainfall are uncomfortable; areas with little seasonal variation attract people. Mediterranean regions were settled early because of their pleasant climate.
Soils: fertile loamy soils support intensive agriculture and so more people.

3. Economic factors.

Minerals: deposits attract mining and industry, which draw skilled and semi-skilled workers. Example: the Katanga-Zambia copper belt in Africa.
Urbanisation: cities offer jobs, education, medical care, transport, communication and civic amenities, causing rural-to-urban migration; mega cities attract migrants every year.
Industrialisation: industrial belts employ factory workers and also transport operators, shopkeepers, bank staff, doctors and teachers. Example: the Kobe-Osaka region of Japan.

4. Social and cultural factors.

Places of religious or cultural significance attract people.
People move away from areas of social and political unrest.
Governments sometimes offer incentives to settle sparse areas or leave overcrowded ones.

5. How factors combine. A region is crowded when several factors point the same way: the Ganga plains have water, flat land, fertile soil and a long farming history. A region is empty when several factors work against people: polar regions are cold, have little soil and offer few jobs. Technology can change this over time (mining towns in deserts).

Map and diagram checklist (no board map item for this chapter).

On a world outline, shade dense areas: south and east Asia, north-west Europe, north-eastern USA.
Label sparse areas: polar regions, hot deserts such as the Atacama and Sahara, high mountains, equatorial forests.
Mark the Katanga-Zambia copper belt and Kobe-Osaka as economic-factor examples.

Key quotations

Short lines worth knowing by heart: who says them, when, and why they matter.

Water is the most important factor for life.
NCERT, Chapter 2: First of the geographical factors.
Explains why river valleys are densely populated.

Factors Influencing World Population Distribution: key facts

Density of population: $Density = \frac{Population}{Area}$ persons per sq km; Divide people by land area, not the other way round.
Three groups of factors: Geographical water, landforms, climate, soils
Economic minerals, urbanisation, industrialisation
Social and cultural religious or cultural significance, unrest, government incentives; NCERT's order.
NCERT examples: River valleys water
Ganga plains flat land
Himalayas sparse, mountains
Mediterranean pleasant climate
Katanga-Zambia copper belt minerals
Kobe-Osaka industries; One example per factor earns the example mark.
Key figures: About 90% of people on about 10% of land
10 most populous countries: about 60%
6 of these 10 in Asia
Over 6 billion people at the start of the 21st century; From NCERT Chapter 2.

Geographical	water, landforms, climate, soils
Economic	minerals, urbanisation, industrialisation
Social and cultural	religious or cultural significance, unrest, government incentives

River valleys	water
Ganga plains	flat land
Himalayas	sparse, mountains
Mediterranean	pleasant climate
Katanga-Zambia copper belt	minerals
Kobe-Osaka	industries

How to answer Factors Influencing World Population Distribution questions

Expect matching items (place to factor), assertion-reason on river valleys or deserts, short questions on economic or geographical factors, and 5-mark questions asking for all three groups. A density calculation may appear as an MCQ.

1Read whether the question asks for geographical, economic or all factors; answer only the group asked.
2For each factor write: the factor, why it attracts or repels people, and one place.
3In 5-mark answers cover all three groups and give at least five factors.
4For density calculations, convert units first and divide population by area.
5End a long answer by noting that factors act together, which is why distribution is uneven.

Factors Influencing World Population Distribution in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Economic factors: industrialisation and services

Suppose a large car factory opens near a small town. Within ten years the town has new schools, hospitals, banks, shops and bus services.

Explain why the town's population would grow much faster than the number of factory jobs.

Try it first, then show the solutionSolution

The factory employs workers directly.
Those workers need shops, transport, banking, schools and doctors.
Each service creates more jobs, attracting still more people.

Answer: Industrial belts attract not only factory workers but also transport operators, shopkeepers, bank employees, doctors and teachers, so population grows beyond the factory itself, as in the Kobe-Osaka region of Japan.

Memory hook: One factory, many jobs: industry pulls people in layers.

Density of population

Imagine two districts. District P has 9,00,000 people on 1,800 sq km. District Q has 4,20,000 people on 600 sq km.

Which district is more densely populated?

Try it first, then show the solutionSolution

Density of P = 9,00,000 ÷ 1,800 = 500 persons per sq km.
Density of Q = 4,20,000 ÷ 600 = 700 persons per sq km.
Compare: 700 is greater than 500.

Answer: District Q, with 700 persons per sq km, is more densely populated than P (500), even though P has more people.

Memory hook: More people does not mean more crowded: divide by area.

Tricks to remember Factors Influencing World Population Distribution

Short memory aids. Say each one aloud once, then use it on a question the same day.

WaLCS for geography, MUI for economy
Geographical: Water, Landforms, Climate, Soils (WaLCS = 'walks'). Economic: Minerals, Urbanisation, Industrialisation (MUI).
Use it when: Listing factors quickly.
Katanga copper, Kobe cars
K for Katanga = minerals; K for Kobe = industries. Both are economic.
Use it when: Matching items on economic factors.

Factors Influencing World Population Distribution: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Matching places to factors · 1 mark · MCQBoard level

Match the places with the factor that best explains their population:
I. Ganga plains - 1. Industrialisation
II. Katanga-Zambia copper belt - 2. Pleasant climate
III. Kobe-Osaka region - 3. Flat land and fertile soil
IV. Mediterranean regions - 4. Mineral deposits
(A) I-3, II-4, III-1, IV-2
(B) I-4, II-3, III-2, IV-1
(C) I-1, II-4, III-3, IV-2
(D) I-3, II-1, III-4, IV-2

Try it first, then show the solutionSolution

Ganga plains: landform and soil; Katanga: minerals; Kobe-Osaka: industries; Mediterranean: climate (1 mark).

Answer: (A) I-3, II-4, III-1, IV-2

Example 2: Density calculation · 1 mark · MCQHarder board level

A region has an area of 250 sq km and a population of 3,75,000. Its density of population is:
(A) 150 persons per sq km
(B) 1,500 persons per sq km
(C) 15,000 persons per sq km
(D) 937 persons per sq km

Try it first, then show the solutionSolution

Density = 3,75,000 ÷ 250 = 1,500 persons per sq km (1 mark).

Answer: (B) 1,500 persons per sq km

Example 3: Assertion and reason on river valleys · 1 mark · Assertion-reasonHarder board level

Assertion (A): River valleys are among the most densely populated areas of the world.
Reason (R): Fresh water is needed for drinking, cooking, cattle, crops, industries and navigation.
(A) Both (A) and (R) are true and (R) is the correct explanation of (A).
(B) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(C) (A) is true but (R) is false.
(D) (A) is false but (R) is true.

Try it first, then show the solutionSolution

Both are true and the many uses of water explain why people crowd into river valleys (1 mark).

Answer: (A) Both (A) and (R) are true and (R) is the correct explanation of (A).

Example 4: Economic factors · 3 marks · Short answerBoard level

A copper belt in Africa, a mega city and an industrial belt in Japan all attract large numbers of people. Explain the economic factor at work in each case. (3 marks)

Try it first, then show the solutionSolution

Minerals: attract mining and industry, employing skilled and semi-skilled workers; Katanga-Zambia copper belt (1 mark).
Urbanisation: jobs, education, health, transport and civic amenities in cities cause rural-urban migration; mega cities (1 mark).
Industrialisation: industrial belts employ factory and service workers; Kobe-Osaka region of Japan (1 mark).

Answer: (1) Minerals: mineral deposits attract mining and industries, which create jobs, so skilled and semi-skilled workers move in, as in the Katanga-Zambia copper belt of Africa. (2) Urbanisation: cities offer better jobs, schools, hospitals, transport and civic amenities, so people migrate from villages and mega cities keep growing. (3) Industrialisation: industrial belts employ not only factory workers but also transport operators, shopkeepers, bankers, doctors and teachers, so they become densely populated, like the Kobe-Osaka region of Japan.

Example 5: Long answer: all factors · 5 marks · Long answerHOTS / competency

"The population of the world is unevenly distributed." Examine the geographical, economic and social factors responsible for this. (5 marks)

Try it first, then show the solutionSolution

Introduction: about 90% of people live on about 10% of land; Cressey's remark (1 mark).
Geographical: water (river valleys), landforms (Ganga plains vs Himalayas), climate (Mediterranean vs deserts), soils (loamy) (1.5 marks).
Economic: minerals (Katanga-Zambia), urbanisation (mega cities), industrialisation (Kobe-Osaka) (1.5 marks).
Social-cultural: religious or cultural centres, unrest, government incentives (0.5 mark).
Conclusion: factors combine, so a few areas are very crowded and many are nearly empty (0.5 mark).

Answer: About 90 per cent of the world's people live on about 10 per cent of its land, and Cressey's remark that Asia has many places with few people and a few places with very many fits the whole world.

Geographical factors come first. Water is essential for life and work, so river valleys are crowded. Flat plains and gentle slopes favour farming, roads and industry, which is why the Ganga plains are dense while Himalayan zones are thin. Comfortable climates such as the Mediterranean drew people early, while very hot or cold deserts repel them. Fertile loamy soils support intensive farming and many people.

Economic factors add to this. Mineral deposits such as the Katanga-Zambia copper belt attract workers; cities with jobs and amenities draw migrants; industrial belts such as Kobe-Osaka employ both factory and service workers.

Social and cultural factors also matter: religious or cultural centres attract people, unrest drives them away, and governments may offer incentives to settle sparse areas.

Because these factors reinforce each other, a few favoured regions are very crowded and large harsh areas remain nearly empty.

Where students lose marks in Factors Influencing World Population Distribution

The slips examiners see most often, and what to write instead.

Mistake: Inverting the density formula
Students divide area by population.
Wrong working
Density = 250 ÷ 3,75,000 = 0.0007.
Right working
Density = 3,75,000 ÷ 250 = 1,500 persons per sq km.
Do this: People per unit of land: people on top.
Usually costs: 1 mark.
Mistake: Factors without examples
Students list factor names only.
Wrong working
Minerals attract people.
Right working
Mineral deposits attract mining jobs, e.g. the Katanga-Zambia copper belt.
Do this: Factor + reason + place.
Usually costs: 1 mark per factor in 3- and 5-mark answers.
Mistake: Putting urbanisation under geographical factors
Cities are places, so students think 'geographical'.
Wrong working
Geographical factors: water, landforms, urbanisation.
Right working
Urbanisation is an economic factor, with minerals and industrialisation.
Do this: WaLCS vs MUI.
Usually costs: 1 mark.
Mistake: Saying climate alone decides population
Over-simplifying the 5-mark answer.
Wrong working
Only areas with good climate are densely populated.
Right working
Several factors act together; mining or industry can make even harsh areas populous.
Do this: Add a line on interaction of factors.
Usually costs: The judgement mark.

Exam tips

Asked in: 2026-27 sample paper Q1 (1 mark, matching Thar desert, Mediterranean regions, Katanga-Zambia copper belt and Kobe-Osaka with factors); 2024 board paper 64/2/1 Q21 (3 marks, three economic factors with examples); 2026 board paper 64/4/1 Q2 (1 mark, assertion-reason on river valleys and water) and Q1 (1 mark, Cressey's remark on Asia); 2023 board paper 64/3/1 Q27 (5 marks, factors affecting density, India context). The answers on this page are our own.
Use the NCERT examples; examiners look for Katanga-Zambia, Kobe-Osaka, Ganga plains and Mediterranean regions.
In a density MCQ, check the answer's order of magnitude: a crowded plain has hundreds or thousands per sq km, not decimals.
For a 5-mark answer write about 120-150 words: intro line, three groups, one-line conclusion.

Practice questions on Factors Influencing World Population Distribution

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
Which one of the following areas is thinly populated mainly because of its landform?
(A) Ganga plains
(B) Kobe-Osaka region
(C) Mountain zones of the Himalayas
(D) Mediterranean regions
Hint
Which landform hinders transport, farming and industry?
Answer
(C) Mountain zones of the Himalayas.
Q2 · 1 mark · Assertion-reasonHarder board level
Assertion (A): Mountainous areas tend to be less populated.
Reason (R): Mountains hinder the development of transport networks and initially discourage agriculture and industry.
(A) Both (A) and (R) are true and (R) is the correct explanation of (A).
(B) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(C) (A) is true but (R) is false.
(D) (A) is false but (R) is true.
Hint
Landforms factor.
Answer
(A) Both are true and R explains A.
Q3 · 2 marks · Very short answerHarder board level
Region A has 6,00,000 people on 400 sq km; region B has 8,00,000 people on 1,000 sq km. Calculate both densities and state which region has more pressure on land. (2 marks)
Hint
Divide each population by its area.
Answer
A: 6,00,000 ÷ 400 = 1,500 persons per sq km. B: 8,00,000 ÷ 1,000 = 800 persons per sq km. Region A has more pressure on land despite having fewer people.
Q4 · 3 marks · Short answerBoard level
Explain how climate and soils influence the distribution of population. (3 marks)
Hint
Comfortable vs extreme; loamy vs poor.
Answer
Climate: very hot or very cold deserts and areas of very heavy rainfall or harsh climate are uncomfortable and thinly populated, while areas with comfortable climates and little seasonal variation attract people; Mediterranean regions were settled early for their pleasant climate. Soils: fertile loamy soils support intensive agriculture and allied activities, so such areas hold many people, while poor soils support few.
Q5 · 3 marks · Short answerHOTS / competency
Suppose a government builds roads, offers free land and tax relief to families moving to a thinly populated border district. Which group of factors is this, and why may it not succeed on its own? (3 marks)
Hint
Social-cultural factor vs geographical limits.
Answer
It is a social and cultural factor: governments sometimes offer incentives to settle sparsely populated areas. It may not succeed alone because geographical factors such as shortage of water, rugged land, harsh climate or poor soil, and economic factors such as lack of jobs, may still make the area unattractive. Lasting settlement needs water, livelihoods and services too.
Q6 · 2 marks · Very short answerHarder board level
Why do industrial belts attract people other than factory workers? Give examples of such people. (2 marks)
Hint
Services follow industry.
Answer
Because industry creates demand for many services. Industrial belts attract transport operators, shopkeepers, bank employees, doctors, teachers and other service providers along with factory workers.
Q7 · 5 marks · Long answerHOTS / competency
"Cities attract people, yet city life can be very taxing." Examine both parts of this statement. (5 marks)
Hint
Pull of urbanisation; costs of crowding.
Answer
Cities attract people because they offer better jobs, educational and medical facilities, better transport and communication, good civic amenities and the attraction of city life. These pull factors cause rural-to-urban migration, and mega cities keep receiving many migrants every year, which is why urbanisation is an economic factor of population distribution. Yet NCERT also asks us to think about the unpleasant side: crowding raises housing costs and creates slums, traffic congestion, pollution, pressure on water and waste services, and long commutes. So cities concentrate population because of opportunities, but the same concentration produces problems that reduce the quality of life; planning must balance both.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.What share of the world's people lives on about 10 per cent of its land?Show answer
About 90 per cent.
2.Which is the most important geographical factor for population?Show answer
Availability of water.
3.Give NCERT's example of a mining area that attracts population.Show answer
The Katanga-Zambia copper belt in Africa.
4.Which region of Japan is crowded because of industries?Show answer
The Kobe-Osaka region.
5.In what unit is density usually measured?Show answer
Persons per sq km.

Factors Influencing World Population Distribution: frequently asked questions

What are the factors influencing the distribution of population?

Geographical factors (water, landforms, climate, soils), economic factors (minerals, urbanisation, industrialisation) and social and cultural factors (religious or cultural significance, social and political unrest, government incentives).

How is density of population calculated?

Divide the population by the area. For example, 3,75,000 people on 250 sq km give 1,500 persons per sq km.

Why are river valleys densely populated?

Because fresh water, the most important need for life, is easily available for drinking, cooking, cattle, crops, industries and navigation, and valleys usually have flat land and fertile soil.

Why is the world's population unevenly distributed?

Because favourable factors such as water, flat fertile land, a comfortable climate, minerals, cities and industries are concentrated in a few areas, while large areas are too cold, dry, steep or remote.