Class 12 Geography - CBSE
The World Population Distribution Density and Growth
The chapter 'The World Population Distribution, Density, and Growth' explores the patterns of human population across the globe, examining why some areas are densely populated while others remain empty. It introduces crucial demographic concepts like crude birth rate, death rate, and migration, which explain how populations grow or decline over time. For CBSE Class 12 Geography board exams, this chapter is fundamental because it forms the baseline for human geography. Questions frequently test your understanding of geographical factors influencing distribution, demographic transition theory, and calculations related to population density and growth rates.
Start Learning FreeKey Concepts
Population Distribution
The way people are spaced over the Earth's surface, which is highly uneven with most people living in a few select regions.
Population Density
The ratio between the number of people and the size of the land, usually measured in persons per square kilometre.
Demographic Transition Theory
A model that describes population growth over time as a country moves from an agrarian society with high birth and death rates to an industrial society with low birth and death rates.
Push and Pull Factors
Push factors (like unemployment or poverty) drive people away from an area, while pull factors (like better jobs and education) attract them to a new location.
Natural Growth of Population
The population increase calculated by subtracting the crude death rate from the crude birth rate over a specific period.
Important Formulas
Board Exam Info
In CBSE Class 12 Geography, this chapter typically carries around 4 to 6 marks in the board exam. Questions usually include 1-mark objective questions, map-marking items (identifying regions of high or low population density), and 3-to-5-mark analytical questions explaining geographical factors affecting population distribution or stages of demographic transition.
Frequently Asked Questions
Population growth refers specifically to the numerical increase in a population over time, which can be positive or negative. Population change, on the other hand, includes growth as well as the changes in the composition, structure, and distribution of the population due to births, deaths, and migration.
Why are some areas densely populated while others are sparsely populated?
Population distribution is heavily influenced by geographical factors. Favorable climates, fertile soil, flat plains, and abundant water sources attract dense populations (e.g., river valleys like the Ganga or Yangtze). Conversely, extreme climates like freezing polar regions, arid deserts, and rugged mountainous terrain discourage settlement, resulting in sparse populations.
What are the three components of population change?
The three main components of population change are births, deaths, and migration. Births increase the population, deaths decrease it, and migration changes the distribution and size of the population as people move between regions.
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