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Population
- Birth rate - the number of babies
born per 1000 people per year
- Death rate - the number of deaths
per 1000 people per year
- Natural change - the difference between birth
and death rates expressed as a percentage
- Natural increase - when the birth rate exceeds
the death rate and the population goes up
- Natural decrease - where the death rate exceeds
the birth rate and the population goes down
- Zero growth - the population is in balance. The birth rate is
equal to the death rate so there is no growth or decrease
- Exponential growth - the pattern where
the rate of growth constantly increases
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