| A | B |
|---|
| the number of births in a year for every 1,000 people in a population | birth rate |
| the number of deaths in a year for every 1,000 people in a population | death rate |
| the study of human population, including how they change due to births, deaths, aging, and migration | demography |
| the number of old and young people who don't work compared with the working-age population | dependency ratio |
| the average age to which a person is a given population can expect to live | life expectency |
| the total fertility rate needed for a population to replace itself | replacement rate |
| the average number of children a woman in a given population will have in her lifetime | total fertility rate |
| a group of people banded together or treated as a group | cohort |
| a wealthy country with an advanced economy | developed country |
| a poorer country with a less advanced economy | developing country |
| birth rates remain high; death rates fall | rapid growth rate |
| birth rates drop; death rates stay low | slow growth rate |
| both birth rates and death rates drop | negative growth rate |
