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Unformatted text preview: Mortality rates go up as population goes up If the birth rate is bigger than the death rate, population will grow Birth rate decrease + mortality rate increase = population goes down When population size is small, there are more comings than goings When population increase, births go down and deaths go up When birth rate and death rate are equal, you reach the carrying capacity, K Birth rate and death rate Developed countries are growing slower Developing countries are growing faster; Africa is the fastest The greater the difference between birth rate and death rate, the greater is the rate of annual growth Annual rate of growth (Birth rate death rate)/10 .7% US How long does it take for populations to double? Rule of 70: 70/annual percentage of population growth Zimbabwe 70/3.5= 20 years This rule is assuming that it is a closed systempeople arent coming or going...
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- Spring '08