Distinguish between population growth and population change.
i) When there is a high birth rate and low death rate, this leads to a sharp increase in population and therefore it is called population growth.
ii) Population change is calculated by subtracting the current population to its previous years. This mainly occurs due to migration, births, deaths.
iii) Population change (absolute number) = Population later date - Population at an earlier date
iv) Population change in a place = (Number of births + number of in migrants) - Number of deaths+ number of out-migrants).