apes - formulas

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Environmental Science

11th

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7 Terms

1
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Population change
(Births + Immigrations) - (Deaths + Emigration)
2
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Finding the population growth rate
r =( Births + Immigrants) - (Deaths + emigration) x 100 ÷ total population
3
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Crude growth rate
(Births + Immigration) - (Deaths + Emigration) x 10
4
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Population density
Population ÷ area = Population density
5
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Finding birth/death rate
Births ÷ total population x 100 = a percent%
6
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Crude birth/death rate
Births ÷ 10 = %
7
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Finding doubling time of a population
70 ÷ r (growth rate) = % don’t move play with decimal