| A | B |
| region | n area in which many features are similar |
| population | number of people in an area |
| environment | the surroundings in whch people, plants, and animals live |
| relative location | where a place is when compared to other places |
| prairie | an area of flat or rolling land covered mostly by grasses |
| irrigation | use of canals, ditches, or pipes to mve water |
| climate | the kind weather a place has over a long time |
| landform region | region that has similar landforms throughout |
| tributary | aa stream or river that flows into a larger stream or river |
| modify | change |
| elevation | the height of land in relation to sea level |
| river system | a river and its tributaries |
| mountain range | a group of connected mountains |