Key Terms Ch. 2 B
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Created by:
nastassyangel on October 21, 2010
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11 terms
Terms | Definitions |
|---|---|
 Demographic Transition Model | A society's process of change from high CBRs and CDRs and low NRI to low CDRs, CBRs, and NRI and a higher total population |
| Agricultural Revolution | The switch from a hunting and gathering society to farming |
| Industrial Revolution | Improvements in mechanical technology; changed process of manufacturing goods |
| Medical Revolution | Improved medical technology and practices originate in Europe and North America and then diffuse to poorer countries |
| Zero Population Growth | The fertility rate is so low that the NRI equals zero |
| Population Pyramid | A bar graph that shows population distribution by age and gender |
| Dependency Ratio | The number of people under 15 and over 64, compared to the number of working people |
| Sex ratio | The number of males per 100 females in the population |
| Malthus theory of population growth | The world's rate of population increase is far outrunning the development of food supplies |
| Epidemiologic transition | Distinctive causes of death in each stage of the demographic transition |
| Pandemic | Disease that occurs over a wide geographic area and affects a very high proportion of the population |
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