Across
- 5. Group of organisms that can breed.
- 7. Soil and rock removed by wind or water.
- 8. Unneeded materials thrown away.
- 9. Energy from the sun.
- 10. Living community and their environment.
- 12. Too much water covering land.
- 14. Natural home of an animal or plant.
- 16. Remains of ancient plants or animals.
- 18. Turning old things into new things.
Down
- 1. Decayed material used as fertilizer.
- 2. Element in fossil fuels.
- 3. Large, slow-moving ice.
- 4. Cutting down many trees.
- 6. At risk of disappearing.
- 11. Food grown without chemicals.
- 13. Long period with no rain.
- 15. Variety of plants and animals.
- 17. Tall plant with a trunk and branches.