geography

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Across
  1. 4. a small river stream that joins onto a larger river
  2. 5. the area of high land forming the edge of a river basin
  3. 6. the point where 2 rivers meet
  4. 7. upwards
  5. 9. rocks being worn down
Down
  1. 1. start
  2. 2. end
  3. 3. the way water travels
  4. 8. side to side