Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Demography | Study of population change
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| Population explosion | Rapid growth of population in the twentieth century
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| Birth rate | Number of births per 1000 ppl per year
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| Death rate | Number of deaths per 1000 ppl per year
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| Natural increase | When the birth rate is higher than the death rate
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| Natural decrease | When the death rate is higher than the birth rate
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| Calculation of population change | Birth rate - death rate over 1000 multiplied by 100
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| Population distribution | Refers to how ppl are dispersed around the world or in any given area
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| Population density | Average number of ppl living in a square kilometre
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| Calculating population density | Population dived by area of land
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| High density problems | Overcrowding, pollution, shortage of clean water, lack of open space
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| Low density problems | Low marriage rates, abandonment of agricultural land, political or economical isolation
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| D.T.M stage 1 | High fluctuating stage- high birth and death rate
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| D.T.M stage 2 | Early expanding stage- death rate declines rapidly, birth rate declines slowly
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| D.T.M stage 3 | Late expanding stage- death rate falls more slowly, birth rate falls quicker
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| D.T.M stage 4 | Low fluctuating stage- birth rate continues to fall slowly, death rate is steady
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| D.T.M stage 5 | Senile stage- low birth no death rate
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| Food supply | Increases-health increases-people live longer-decrees death rate
Decreases-health declines-population declines-famine,drought
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| War | Population is reduced directly when soldiers and civilians die
Interrupts fam life, couples separated, reduction in birth rates
Disrupt daily life e.g agriculture, water supply,sanitation-affect health,death
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| Technological developments | Green revolution in Europe: inventions have increased farm productivity e.g improved ploughs,tractors,threshing machines,combine harvesters,irrigation
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| Health |
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Created by:
Orlaf
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