Life on the Orinoco

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Across
  1. 2. Move forwards, usually continuously and easily
  2. 4. A strong wall built across a river to stop the water
  3. 8. The world’s biggest rodent
  4. 11. A small body of water that moves in one direction
  5. 15. An area of land used to protect wild animals and plants
  6. 16. Very old
  7. 18. Things that naturally exist in a place and can be used by people
  8. 21. A valuable, shiny, yellow metal
  9. 22. Move a small boat forward with a short piece of flat wood
Down
  1. 1. Very high areas of land with steep sides
  2. 3. A very large body of salty water
  3. 4. The place where a big river meets the sea and looks like roots
  4. 5. An animal that looks like a cheetah but lives in the forest
  5. 6. A very large area of flat land
  6. 7. Very valuable clear stones
  7. 9. A large, hot area of trees where it rains a lot
  8. 10. A type of small animal with fur and long, sharp teeth
  9. 12. A tropical fish that eats meat
  10. 13. A place where water falls from a higher area
  11. 14. A large body of water that moves in one direction
  12. 17. An dangerous animal with thick skin and big mouth that lives in the water
  13. 19. A kind of huge snake that lives in the water
  14. 20. A thick, valuable black liquid that comes from under the ground