Across
- 2. a small critter but not a canine
- 5. a river of rock, ice, and snow
- 7. a large rocky structure
- 9. a river that goes over a cliff
- 11. seed of the pine tree
- 13. makings of a lawn
- 15. frozen water
- 17. in danger of extinction
Down
- 1. a channel of water smaller than a river
- 3. a frozen body of water
- 4. an herbivore that changes color in the winter
- 6. a fallen dead tree
- 8. a species on which other species in an ecosystem largely depend
- 10. a sheer rock face
- 12. a tree that stays green in the winter
- 14. a tree with needles
- 16. water frozen in flakes