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population (world population (key words (exponential - something doubles…
population
world population
key words
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natural change - a change in the size of the population based on the relationship between birth rates and death rates
dependency ratio - the ratio between the economically active people and the people who rely on the economically active people
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at present, the global population in increasing rapidly
compared to HIC, LIC have higher birth rates
however, in the last century, birth rates in LIC have dropped
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in many LIC, the difference between birth rates and death rates are quite large, leading in a high natural increase
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migration
key words
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temporary migration - for a short period, weeks or even a few
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voluntary migration - a choice, for better work or school etc
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population pyramids
LIC population pyramids
narrow top wide base, showing high infant mortality rate
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