| A | B |
| immigrant | a person who leaves one area and moves to another |
| birth rate | number of people born each year for every 1,000 people |
| death rate | number of deaths each year for every 1,000 people |
| push factors | reasons that cause people to leave an area (example: flooding) |
| pull factors | reasons that attract people to another area (example: more freedom) |
| refugee | a person who flees a place to find safety |
| to find jobs | #1 reason people move to cities |
| population | number of peope who live in an area |
| urban | means city |
| rural | means countryside |
| densely populated | crowded places |
| sparsely populated | places that are not crowded |