| A | B |
|---|
| Crude Birth Rate | Total number of births in a year, per 1000 people |
| Crude Death Rate | Total number of deaths in a year, per 1000 people. |
| Demographic transition | Change from a high crude birth and death rate to a low crude birth and death rate. |
| Demography | The scientific study of population characteristics. |
| Doubling Time | The number of years needed to double a population. |
| Ecumene | The portion of earth occupied by human settlement. |
| Infant Mortality Rate | Total number of deaths in a year among 1000 infant births (under 1) |
| Life Expectancy | The average number of years a human can be expected to live. |
| Natural Increase Rate | Percentage growth of population each year. calculated by crude birth rate minus crude death rate. |
| Overpopulation | The number of people in an area, exceding the capacity of the environment to support life. |
| Total Fertility Rate | The average number of children a woman will have throughout her childbearing years. |
