Blog Class 9 Geography

Population Composition :Geography Notes on NCERT

Population and Census 

Census is the most comprehensive demographic, social & economic data of a country .

  • 1st Census held in the year 1872 in India .
  • 1st complete census held in the year 1881

Population distribution trend around the world

  • Broadly, 90 per cent of the world population lives in about 10 per cent of its land area.
  • The 10 most populous countries of the world have about 60 per cent of the world’s population .
  • 6 of the most populated countries are located in Asia .

Population Density

  • The ratio between the numbers of people living in an area of 1 sq Km is called population density.
  • Density of Population =Population/ Area

Trends in Population Density 

  • From the above data find out the population density of Srilanka
  • Which country has the highest population density
  • find out the rank of India in population density
  • What is the population density of China?
  • Name the neighboring countries of India which has high population density than India

Population Density Trend of India 

  • The population density of India in 2011 was 382 per sq km.

  • From the Above table Find out the state with high Population Density ?
  • Find out the Population Density of Odisha?
  • Find out the state which has lowest population Density ?
  • Which Union territory has lowest Population Density?
  • Find the percentage change of population density of Delhi from 2001 to 2011.

Factors affecting population density 

  • Population distribution across the Earth is not Uniform
  • There are areas which are densely populated whereas others are sparsely populated


  • Terrain:Plain areas encourage higher density of population as compared to mountain regions
  • Example More people live in Northen Plain Compared to north east regions
  • Climate: Suitable climate encourage population settlement.
  • Soil :Fertile soil Helps in Agriculture and population growth
  • Other factors are water bodies ,Communications. Industries affect population Density .

Agriculture: Geography Notes for Class 10th NCERT

Population growth

  • The population growth or population change refers to the change in number of inhabitants of an area or territory during a specific period of time.
  • This change may be positive as well as negative.
  • Population change in an area is an important indicator of economic development, social upliftment and historical and cultural background of the region

Components of Population Change

  • There are three components of population change – births, deaths and migration
  • Birth Rate –  Expressed as number of live births in a year per thousand of population.
  • Death Rate –  expressed in terms of number of deaths in a particular year per thousand of population in a particular region
  • Migration: Apart from birth and death there is another way by which the population size changes .who move out of a place are called Emigrants. People migrate for a better economic and social life.

 Factors that influence migration

  • The Push factors make the place of origin seem less attractive for reasons like unemployment, poor living conditions, political turmoil, unpleasant climate, natural disasters, epidemics and socio-economic backwardness.
  •  The Pull factors make the place of destination seem more attractive than the place of origin for reasons like better job opportunities and living conditions, peace and stability, security of life and property and pleasant climate.

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Montane and Mangrove Forest Notes on NCERT Geography

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