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Birth rate: The number of live births per thousand persons in a year.It is a major component of population change because in India birth rates have always been higher than death rates.
Death rate: The number of deaths per thousand persons in a year.
Migration : The movement of people from one place to another.Migration can be internal or international.
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(1) Population change is the change that may result due to migration ,deathrate,birthrate and changes in age composition and sex ratio . (2)even when there is no population growth ,there may be a population change. (3) internal migration brings about a change in population of a country . (4) in a given population , if there is a change in the sex ratio ,it will be considered a population change # Birth rate : it is the no.of live births per 1000 Pearson's. #Death rate: it is the no.of deaths per 1000 Pearson's # Migration: it is divided into two parts - internal migration - external migration * internal migration: moving within the country, this doesn't change the size of the country but composition and distribution of population gets changed. * external migration: moving from one country to other, this changes the size of the population.
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