Wonders of Nature

1234567891011121314151617181920212223242526272829
Across
  1. 2. Open field covered with grass and wildflowers
  2. 5. Deep valley carved by a river
  3. 6. Massive ocean wave usually caused by an underwater earthquake
  4. 9. Natural feature where water drops over a steep edge
  5. 11. Large slow-moving mass of ice
  6. 12. Landform created where a river meets a larger body of water
  7. 14. Seasonal wind bringing heavy rainfall
  8. 19. Small body of still water
  9. 20. Low area between hills or mountains
  10. 21. Vast area of flat grassland
  11. 22. Narrow sea inlet bordered by steep cliffs
  12. 26. Area of land saturated with water
  13. 27. Natural light display seen near polar regions
  14. 29. Fertile spot in a desert with water
Down
  1. 1. Electrical discharge during a storm
  2. 3. Hill of sand shaped by the wind
  3. 4. Mountain that can erupt with lava and ash
  4. 5. Steep rock face
  5. 7. Tropical grassland with scattered trees
  6. 8. Hot spring that periodically erupts with steam and water
  7. 10. Shallow body of water separated from the sea
  8. 13. Sound produced by lightning
  9. 15. Colorful marine structure built by tiny sea animals
  10. 16. Natural underground chamber
  11. 17. Land surrounded by water
  12. 18. Ridge of rock or coral beneath the water's surface
  13. 23. Dense tropical forest
  14. 24. Large area covered with trees
  15. 25. Treeless plain found in cold regions
  16. 28. Arc of colors formed by sunlight and water droplets