Nature

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Across
  1. 3. a large hill
  2. 4. area of low land between hills
  3. 7. a mountain with lava
  4. 8. a forrest with many trees and plants
  5. 10. a dry solid sticks out of the ground or sea
  6. 11. a flow of water
  7. 12. a place full of sand
Down
  1. 1. a very area of sea
  2. 2. water drops from a great height
  3. 5. a large hole in the hill
  4. 6. a forest in a tropical forest
  5. 9. a large area of water