Across
- 3. thorny bushes
- 5. dry land
- 7. rain forest
- 8. zone
- 10. grasslands
- 12. zone
- 14. reef
- 16. zone
- 17. tropical grassland
- 18. heat
Down
- 1. frozen ground
- 2. land based
- 4. marshes
- 6. resistance
- 9. deciduous forest
- 10. treeless plain
- 11. large river
- 13. con-bearing tree
- 14. shade
- 15. boreal forest