Across
- 2. Violent, rotating column of air
- 6. Marine invertebrate with a hard, exoskeleton
- 7. Spiny marine animal with five arms
- 9. Natural feature where water drops from a height
- 11. Atmospheric phenomena of light and colour
- 13. Visible mass of condensed water vapor
- 14. Colourful insect with delicate wings
- 16. Flying insect that collects nectar and pollen
- 18. Tall plant with large yellow flowers
- 20. Ice crystal that falls from the sky
Down
- 1. Tall landform that rises above its surroundings
- 3. Natural light display in the polar regions
- 4. Mountain that opens at the top to a pool of molten rock
- 5. Large, flowing body of water
- 8. Outdoor activity of walking in natural environments
- 10. Large body of water surrounded by land
- 12. Uncultivated, uninhabited area of land
- 15. Activity of observing birds in their natural habitat
- 17. Vast body of saltwater
- 19. Dense collection of trees and underbrush