Across
- 1. sweet liquid inside a flower
- 4. mixture of decaying organic matter
- 6. area designated to receive household garbage
- 8. offspring of male donkey and female horse
- 9. destruction of forests
- 10. system comprising ecosystems and organisms
- 12. the worlds cleanest country
- 15. most abundant element found in air
- 16. opening in the earths crust from which lava flow
- 19. bird which lays the largest egg
- 21. the worlds largest biome
Down
- 2. underground layer of water-bearing permeable rock
- 3. the driest biome
- 4. substance that makes plant green
- 5. the wave energy released by earthquakes
- 7. substance that repels or kills plant or animal pests
- 11. any substance that evaporates quickly
- 13. extended period of no water
- 14. mixture of smoke and fog
- 17. chemical substance contained in all plants and animals
- 18. fastest cat in the world
- 20. largest plant family