River

2. a pool of liquid (such as water, lava, oil or pitch)
3. the line between one river basin and the other
7. the channel occupied by a river
9. the geological process in which earthen materials are worn away and transported by natural forces such as wind or water
11. where a river meets the sea
13. where the river starts
14. flat land beside river that may flood
17. a small river
18. a deep, narrow valley with steep sides
19. an overflowing of water onto land
20. smaller river join the main river

1. a curve in a river
4. a place where groundwater flows out of the ground
5. a stream of water that flows through a channel in the surface of the ground
6. a place where water flows over the edge of a steep, high cliff in hills or mountains, and fall into a pool below
8. the geological process where material is added to a land or a landform
10. land above the edge of a river
12. the points where two rivers meet
15. where the river flows into a lake or a sea
16. landform created by deposition of sediment, carried by a river