RIVERS

2. The wearing away of a channel's sides and bed by stones moved in the water
3. This drainage pattern looks like spokes on a wheel
5. The merging of two or more bodies of water
7. The implosion of air bubbles in rocks' cracks, causing pieces of rock to eventually break off
11. The point where a river begins
16. This drainage pattern resembles a tree trunk and branches
17. The process where small stones knock against one another and break into smaller pieces as they are carried in the water
19. The transportation of fine particles in the water
20. The process where trees release water vapour into the atmosphere through their leaves

1. This occurs after clouds become saturated
4. The downward movement of water through the soil
6. The process where river water reacts with minerals in the rock, dissolving them
8. The rolling of large stones and boulders along the river bed in times of high discharge
9. The process where heat from the sun converts water into water vapour
10. A smaller channel that connects to the main river
12. The process of the cooling of water vapour to form tiny water droplets
13. A drainage pattern where tributaries connect to the main river at roughly 90 degrees
14. The skipping and bouncing of small stones along the river bed as they are moved by the water
15. An imaginary line that separates drainage basins
18. The point where a river empties into the sea