| A | B |
| Young streams | flows swiftly through a steep valley |
| Flooding | overflows its banks |
| Dams | built to control the flow of water downstream |
| Levees | mounds built along sides of a river to prevent flooding |
| Deposition | water slows down,drops,or deposits the sediments its carrying |
| Delta | formed by sediments that are deposited as water empties into an ocean or lake |
| Alluvial fan | fan-shaped area formed by sediments deposited |
| Groundwater | water that soaks into ground & collects in pores of rock underlying soil |