NATURAL WORLD

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Across
  1. 3. colourful arc in the sky
  2. 6. a big hole in a mountain
  3. 8. a place with many trees
  4. 9. a small road for walking
  5. 10. a living thing that grows in soil
Down
  1. 1. small river
  2. 2. green plants covering the ground
  3. 4. water falling from a high place
  4. 5. white/grey thing in the sky
  5. 7. brown material on the ground