Across
- 1. Large ecological region
- 6. Sudden earth movement
- 9. Rapid snow slide
- 11. Temperate grassland
- 12. Wind-shaped sand hill
- 13. Semi-arid grassland
- 14. Land bordering the sea
- 16. Open forest region
- 18. Slow-moving ice mass
- 20. Dense tropical forest
- 21. Treeless polar plain
- 24. Permanently frozen ground
- 25. Wearing away of land
Down
- 2. Thick polar ice cover
- 3. Thick tropical vegetation
- 4. Tropical grassland
- 5. Narrow land bridge
- 7. Fertile spot in a desert
- 8. Large area of trees
- 10. Sandy shoreline
- 15. Edge of water and land
- 17. Steep rock face
- 19. Floating ice chunk
- 22. Extremely dry region
- 23. Northern coniferous forest