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| 11927483179 | demography | Scientific study of human populations. |  | 0 |
| 11927494876 | immigration | Movement of individuals into a population |  | 1 |
| 11927501320 | emigration | Movement of individuals out of an area |  | 2 |
| 11927510266 | Crude Birth Rate (CBR) | The number of live births per year per 1,000 people. |  | 3 |
| 11927515489 | Crude Death Rate (CDR) | The number of deaths per year per 1,000 people. |  | 4 |
| 11927525052 | Doubling Time | The number of years needed to double a population |  | 5 |
| 11927539194 | Halving Time | the time it would take for the population to be decreased by half |  | 6 |
| 11927583701 | Total Fertility Rate (TFR) | The average number of children born to a woman during her childbearing years. |  | 7 |
| 11927594924 | Replacement-level fertility | The number of children that a woman/couple must have in order to replace the number of people in the population who die |  | 8 |
| 11936397531 | Developed Country | a country with relatively high levels of industrialization and income |  | 9 |
| 11936408229 | Developing Country | a country with relatively low levels of industrialization and income |  | 10 |
| 11936416499 | Life Expectancy | The average number of years an individual can be expected to live |  | 11 |
| 11936427417 | Infant Mortality | the number of deaths of children under 1 year of age per 1,000 live births |  | 12 |
| 11936431809 | Child Mortality | the number of deaths of children under age 5 per 1,000 live births |  | 13 |
| 11936442367 | Net Migration | the difference between the number of immigrants and the number of emigrants |  | 14 |
| 11936448960 | Age Structure Diagram | graph of the numbers of males and females within different age groups of a population |  | 15 |
| 11936453871 | Population Momentum | continued population growth after growth reduction measures have been implemented |  | 16 |
| 11936462584 | Theory of Demographic Transition | as a country moves from a subsistence economy to industrialization and increased affluence, it undergoes a predictable shift in population growth |  | 17 |
| 11936467635 | Affluence | wealth |  | 18 |
| 11936471133 | Family Planning | Providing information, clinical services, and contraceptives to help people choose the number and spacing of children they want to have. |  | 19 |
| 11936479692 | IPAT equation | Impact = Population x Affluence x Technology |  | 20 |
| 11936487241 | Gross Domestic Product | a measure of the value of all products and services produced in a country in a year |  | 21 |
| 11936503521 | Thomas Malthus | 1798 said human population can outgrow food supply; result will be war, famine, disease. |  | 22 |
| 11936513866 | Garrett Hardin | Wrote Tragedy of the Commons |  | 23 |
| 11936517753 | Tragedy of the Commons | (1968 Essay by Garrett Hardin) the tendency of a shared, limited resource to become depleted because people act from self-interest for short-term gain |  | 24 |
| 11936549049 | Malthusian Trap | Malthus's prediction that a rapidly increasing population will overuse natural resources, leading inevitably to disaster |  | 25 |
