There are mainly ____ main processes of change of population.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1: 3
Explanation:
- Population change depends primarily on three processes. Together, these three processes determine the changes that occur in the size and structure of a region's population:
- Birth Rate: The number of children born per 1,000 persons during a specific period (usually one year). If the birth rate is high, the population increases.
- Death Rate: The number of deaths occurring per 1,000 persons during a specific period. A decline in the death rate is a major cause of population growth.
- Migration: The movement of people from one place to another. It is of two types:
- Immigration: The arrival of people from outside.
- Emigration: The departure of people from a place to go elsewhere.
Natural Causes of Population Growth:-
Natural Growth Rate: The difference between the birth rate and the death rate is referred to as the 'natural growth rate' of the population.
Formula:
Population Change = Births – Deaths ± Migration
Additional Facts:
- The Year 1921: In India, this year is referred to as the 'Year of Great Divide' because, following this year, the death rate witnessed a permanent decline, and the population began to grow rapidly.
- Census: The first census in India was conducted in 1872; however, the first 'complete' census was carried out in 1881. Since then, a census has been conducted every 10 years.
Potential Questions for Upcoming Exams:
Question: What is meant by the 'Natural Growth' of a population?
Answer: The difference between the birth rate and the death rate.
Question: Which process causes a change not in the 'size' of a country's population, but rather in its 'distribution'?
Answer: Internal Migration.
Question: What is the science of studying populations called?
Answer: Demography.