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Overview of The World Population - Distribution, Density and Growth

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Estimated time: 13 minutes
CBSE: Class 12

Key Points: The World Population

  • Uneven Distribution – The world population is unevenly distributed; about 90% of people live on only 10% of the land area.
  • Highly Populated Countries – The 10 most populous countries account for about 60% of the world’s population, and 6 of them are in Asia.
  • Population Distribution – It refers to the way people are spread over the Earth’s surface.
  • Population Density – It is the number of people living per square kilometre of land.
CBSE: Class 12

Formula: Density

\[DensityofPopulation=\frac{Population}{Area}\]

CBSE: Class 12

Key Points: Factors Influencing The Distribution of Population

  • Geographical Factors – Availability of water, fertile soils, flat landforms and favourable climate attract population, while mountains and extreme climates have low population.
  • Water Availability – River valleys are densely populated because water is essential for drinking, agriculture, industries and transport.
  • Economic Factors – Areas rich in minerals and industries attract workers due to employment opportunities, leading to high population density.
  • Urbanisation – Cities provide better jobs, education, medical facilities and transport, so they attract migrants and grow rapidly.
  • Social and Cultural Factors – Religious importance, political stability and government policies also influence where people settle or migrate.
CBSE: Class 12

Key Points: Population Growth

  • Population Growth – Change in population over time (increase or decrease).
  • Natural Growth – Births – Deaths.
  • Actual Growth – Births – Deaths + Migration.
  • CBR & CDR – Births and deaths per 1000 people per year.
  • Migration Factors – Push (poverty, unemployment) and Pull (jobs, better life).
 
CBSE: Class 12

Key Points: Demographic Transition

  • Demographic Transition Theory – Population changes from high birth & death rates to low birth & death rates as a country develops from rural–agricultural to urban–industrial.
  • Stage 1 – High birth rate + high death rate = slow population growth (low literacy, poor health, agrarian economy).
  • Stage 2 – High birth rate + declining death rate = rapid population growth (better health and sanitation).
  • Stage 3 – Low birth rate + low death rate = stable or slow growth (urban, educated, small families).
  • Population Control – Family planning, awareness, contraceptives and small family norms help control population; Malthus warned that unchecked population growth can cause famine and crisis.
 
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