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11 Cards in this Set
- Front
- Back
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Human population recently passed 7 billion. Population continues to rise in developing nations |
It took all of human history after 1800 to reach 1 billion. Then it exploded after the industrial revolution |
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What are the 2 types of population growth? |
Exponential (geometric) and Arithmetic (linear) |
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At today's growth rate, the population will double in 33 years Doubling time formula: 70/percentage |
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Perspectives on human population: 1700s- more children means more labor 1766- Malthus says that growing population is eventually checked by limits on births or increases in deaths 1968- Ehrlich says population is growing too fast |
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Is population growth a problem? |
Yes: less food, space, wealth per person No: new resources could replace depleted ones(?) |
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Sheldon Richman - humans find potential stuff and human intelligence turns it into resources "Humankind will always be able to save itself with a technological fix" population growth is more correlated with poverty than wealth |
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The IPAT model: I = P*A*T*S Population, Affluence, Technology, Sensitivity |
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Paleolithic period, Neolithic (agricultural revolution), Industrial revolution, Medical-technological revolution |
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What do demographers study? |
Population size, density and distribution, age structure, sex ratio, birth/death/immi/emigration rtes |
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What are contributing factors to environmental impact other than population size? |
Population density, population distribution, age structure, affluence, technology, level of consumption |
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Naturally occurring sex ratios for humans slightly favour males (106:100) |
Total fertility rate: average number of children born per female member of a population during her lifetime Replacement fertility: the TFR that keeps the size of a population stable = 2.1 |
