What is natural growth of population? Explain with a big answer.
Answers
Answer:
Demography is the statistical study of human populations. It encompasses the study of the size, structure, and distribution of these populations, and spatial and/or temporal changes in them in response to birth, migration, aging, and death.
Population change depends on the rate of natural increase and net migration.
Natural increase is calculated by the fertility rate minus the mortality rate.
Net migration depends on in-migration and out-migration.
Key Terms
Natural increase: Population growth that depends on the fertility rate and the mortality rate.
Net migration: The difference of immigrants and emigrants of an area in a period of time, divided (usually) per 1,000 inhabitants (considered on midterm population). A positive value represents more people entering the country than leaving it, while a negative value mean more people leaving than entering it.
demography: The study of human populations and how they change.
mortality rate: The number of deaths per given unit of population over a given period of time.
Demography is the statistical study of human populations. It can be a very general science that can be applied to any kind of dynamic living population, or one that changes over time or space. It encompasses the study of the size, structure, and distribution of these populations, and spatial and/or temporal changes in them in response to birth, migration, aging, and death.
Human population growth depends on the rate of natural increase, or the fertility rate minus the mortality rate, and net migration. The basics of demography can be reduced to this formula:
(Births – Deaths) +/- ((In-Migration) – (Out Migration)) = Population Change.
As this equation shows, population change depends on three variables: (1) the natural increase changes seen in birth rates, (2) the natural decrease changes seen in death rates, and (3) the changes seen in migration. Changes in population size can be predicted based on changes in fertility, mortality, and migration rates.
Natural increase refers to the increase in population not due to migration, and it can be calculated with the fertility rate and the mortality rate. Net migration is the mathematical difference between those migrating into a country and those migrating out of a country.
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Explanation:
Put simply, natural increase is the difference between the numbers of births and deaths in a population; the rate of natural increase is the difference between the birthrate and the death rate.