Across
- 3. Upper layer supporting plants
- 4. Thick tropical vegetation
- 6. Floating ice chunk
- 9. Fertile soil layer
- 11. Semi-arid grassland
- 12. Deposited particles
- 14. Large ecological region
- 16. Thick polar ice cover
- 17. Large area of trees
- 19. Breakdown of rock
- 20. Dense tropical forest
Down
- 1. Organic soil matter
- 2. Open forest region
- 5. Sudden earth movement
- 7. Slow-moving ice mass
- 8. Rapid snow slide
- 10. Permanently frozen ground
- 13. Wearing away of land
- 15. Northern coniferous forest
- 18. Treeless polar plain