The natural world

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Across
  1. 2. a flat, green part of a plant
  2. 4. a large area of water that has land all around it
  3. 6. a large area of trees growing close together
  4. 7. an area of land trees and plants
  5. 9. a large hole in the ground or in the side of a mountain
  6. 12. one part of a tree that grow out from the main part
  7. 15. opieces of hard material skin of fish and snakes
  8. 16. a small river
  9. 17. an area of low land between hills or mountains
Down
  1. 1. a large, hot, dry area of land with very few plants
  2. 3. a stream of water that falls from a high place
  3. 5. the thick hair that covers the bodies of some animals
  4. 6. the soft, light things that cover a bird’s skin
  5. 8. a type of net made by a spider
  6. 10. the foot of an animal, such as a cat or a dog
  7. 11. the long part in the back of an animal’s body
  8. 13. one of the five main areas of sea
  9. 14. one of the coloured parts on the outside of a flower