Water On The Land

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Across
  1. 3. a course that has meanders but no waterfalls or deltas
  2. 5. where the river meets the sea
  3. 6. the course with the thinnest river channel
  4. 9. the course with the widest river channel
  5. 13. what does the water in a waterfall fall into
  6. 14. a lake formed by meanders
  7. 15. boulders colliding with each other in the river
Down
  1. 1. where water flows over a cliff
  2. 2. a wiggley river channel formed by erosion
  3. 4. hills in the upper course in a zig zag shape
  4. 7. a circular hole in the river bed formed by hydraulic action
  5. 8. acid in the water dissolves rocks
  6. 10. made by waterfalls retreating upstream over time
  7. 11. flat land where the water overflows onto
  8. 12. built up material on the river banks from flooding