| A | B |
|---|
| birthrate | number of births per year per 1000 people |
| death rate | number of deaths per year per 1000 people |
| demographer | scientist who studies people who live in certain areas |
| immigrant | person who moves to a new country in order to settle there |
| life expectancy | average number of years a person is expected to live |
| migration | mass movement of people, often for job opportunities |
| population density | average number of people who live in a square mile of land |
| population distribution | the way people are spread out over an area |
| rural | place where few people live |
| urban | place where many people live |
