Full Name :K.MANIVANNAN
College Name Department :VELAMMAL ENGINEERING CLG
Subject Code :GE6351
Subject Name :EVS
Study Material Description :
IT IS ABOUT UNIT5
Human population and the Environment
Population:- Group of individuals belonging to the same species which live in a given area at given time.
Population density:- Number of individuals of the population per unit area ® per unit-volume.
Parameters effecting population:-
1. Birthrate (OR) Nationality:- Number of live births per 1,000 people in a population in a given year.
2. Death Rate (OR) Mortality:- Number of deaths per 1000 people in a population in a given year
Immigration:- It denotes the arrival of individuals from neighboring population.
Emigration:- It denotes the disposal of individuals from the original population to new areas.
Birth Rate = Number of births x 100
O.P. x Number of years
Infant Mortality = New born of babies died x 100
Number of babies born x Number of year
Growth rate = Change of population x 100
O.P. x Number of year
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