CBSE Class 9 Geography Chapter 6: Population

Understanding Population Size and Distribution in India

India's population is vast, second only to China. But where do all these people live? The distribution is highly uneven. Imagine a map of India: some areas are dark with high concentrations of people, while others are very light. This is measured by population density, which is the number of persons per square kilometer. Factors like rugged mountains in Jammu & Kashmir or Arunachal Pradesh, or the arid sands of Rajasthan, make life difficult, leading to low population density. In contrast, the fertile Northern Plains (like in Uttar Pradesh, Bihar, West Bengal) and coastal plains (like in Kerala) have high to very high population densities. Why? Because these areas offer flat land for farming, abundant water, and favorable climates. Socio-economic factors also play a huge role. Big cities like Delhi, Mumbai, and Kolkata are magnets for people seeking jobs, better education, and health facilities, leading to dense urban populations.

The Three Engines of Population Change

1. Birth Rate — The birth rate is the number of live births per thousand persons in a year. It is a major component of growth because in India, birth rates have always been higher than death rates. A high birth rate adds more people to the population each year.
2. Death Rate — The death rate is the number of deaths per thousand persons in a year. The main cause of the rate of growth of the Indian population has been the rapid decline in death rates due to improved public health, nutrition, and medical facilities. This creates a large gap between the high birth rate and low death rate, leading to a high rate of population growth.
3. Migration — Migration is the movement of people across regions and territories. Internal migration (within the country) does not change the size of the population, but influences the distribution of population within the nation. It leads to an increase in the population of cities. International migration (between countries) changes both the size and composition of the population.

What Makes Up a Population? Key Attributes

Age Composition

This refers to the number of people in different age groups. A population is generally divided into three broad categories: Children (generally below 15 years), Working Age (15–59 years), and Aged (above 59 years). This structure helps us understand the dependency ratio of a country.

Sex Ratio

Sex ratio is defined as the number of females per 1000 males in the population. This information is an important social indicator to measure the extent of equality between males and females in a society at a given time.

Literacy Rate

According to the Census of 2011, a person aged 7 years and above, who can read and write with understanding in any language, is treated as literate. A high literacy rate is a key indicator of socio-economic development.

Occupational Structure

This is the distribution of the population according to different types of occupation. Occupations are generally classified as Primary (agriculture, mining), Secondary (manufacturing, industry), and Tertiary (transport, services).

Avoid These Common Mistakes in Exams

Many students confuse absolute population with population density. Uttar Pradesh has the highest population (an absolute number), but Delhi has the highest population density (people per sq. km). Remember, density tells you how crowded an area is. Another common mix-up is between population growth and natural increase. Natural increase is just Birth Rate minus Death Rate. Population growth, however, also includes the effect of migration. Always read the question carefully to see if you need to consider migration!

Practice Questions with Solutions

• Q: Why is the population distribution in India highly uneven? Explain with examples.
  A: Step 1: Define uneven population distribution. It means some areas are densely populated while others are sparsely populated.
  Step 2: Explain the physical factors. Mountainous terrains (Himalayas), arid regions (Thar Desert), and forested areas have low populations due to difficult living conditions.
  Step 3: Explain the socio-economic factors. Fertile plains (Ganga Plains) and coastal areas (Kerala) support agriculture and have high populations. Industrial and urban centers like Mumbai and Delhi attract people for jobs, education, and services, leading to very high density.
  Final answer: The uneven population distribution in India is caused by a combination of physical factors like relief and climate, and socio-economic factors like agricultural potential, industrialization, and urbanization.

• Q: Differentiate between population growth and population change.
  A: Step 1: Define population growth. It refers to the change in the number of inhabitants of a territory during a specific period. This can be expressed in absolute numbers or as a percentage.
  Step 2: Define population change. This is a broader term that refers to the dynamics of the population, driven by three key processes.
  Step 3: Explain the components. Population change is a result of birth rates, death rates, and migration. Population growth is the net result of these changes. For instance, high birth rates and low death rates lead to positive growth, but emigration (people leaving) can reduce this growth.
  Final answer: Population growth is the net increase or decrease in population numbers, while population change refers to the three processes (births, deaths, migration) that cause this growth or decline.

• Q: What is meant by the occupational structure of a population? Why is it an important indicator of development?
  A: Step 1: Define occupational structure. It is the distribution of the working population among different economic activities.
  Step 2: Describe the three sectors. These are: Primary (agriculture, mining, forestry), Secondary (manufacturing, construction), and Tertiary (services, transport, banking).
  Step 3: Explain its link to development. Developed countries have a high proportion of their workforce in secondary and tertiary sectors. Developing countries, like India, have a larger proportion of their workforce in the primary sector. A shift from primary to secondary and tertiary activities indicates economic development and modernization.
  Final answer: Occupational structure shows how a country's workforce is employed. A shift towards secondary and tertiary sectors signifies economic development as it indicates industrialization and a move towards a service-based economy.

• Q: What is the sex ratio? Why has it been a matter of concern in India?
  A: Step 1: Define sex ratio. It is the number of females per 1000 males in the population.
  Step 2: State the situation in India. Historically, India has had an unfavorable sex ratio, meaning there are fewer females than males.
  Step 3: Explain the reasons for concern. An unfavorable sex ratio points to deep-rooted social problems like gender discrimination, female foeticide, and lower social status for women. It reflects societal attitudes and has serious demographic and social consequences.
  Final answer: Sex ratio is the number of females per 1000 males. In India, it is a concern because a low ratio indicates widespread gender bias and practices like female foeticide, which are major social evils.

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