| A | B |
|---|
| Birthrate | number of babies born per year per thousand people |
| death rate | number of deaths per year per thousand people |
| doubling time | time needed to increase by 100% or double |
| life expectancy | average number years people live |
| population growth rate | how fast a population grows measured in percent |
| population structure | population makeup by age and gender |
| population density | number of people per square mile |
| population pyramid | a type of bar graph depicting age and gender groupings |
| urbanization | movement of people from rural areas to cities cities |
| demography | the study of human populations |
