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What factors increase a population size?
Births and immigration
What factors decrease a population size?
Death and emigration
what does CBR stand for?
Crude birth rate
what does CDR stand for?
Crude death rate
What does TFR stand for?
Total fertility rate
What is the equation for a countries annual population growth rate?
Gr=(CBR+immigration) - (CDR+immirgation)/10
What is the equation to calculate a population doubling time
70/ growth rate
Age pyramid shape ( developing and developed countries)
Developing countries = pyramid
Developed countries = column
Net migration ( developing countries and developed countries )
Developing = negative
Developed = positive
TFR ( developing countries and devolved countries)
Developing = bigger then 2
Developed = under 2
Note 
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