Earth Day Crossword

Advanced Earth Day-themed Crossword Puzzle

1. A layer of gases surrounding the Earth
2. A building made of glass or plastic to keep plants warm and sheltered from the elements
3. Reducing waste and pollution
4. Clear, colorless substance that covers over 70% of Earth's surface
5. The state of the atmosphere in a given region
6. To use something again after it has been used up
7. In danger of becoming extinct
8. The medium that carries sound waves
9. A color between blue and yellow
10. A large area of land with a lot of trees and plants
11. Derived from living sources
12. The environment and its features
13. A substance found in coal, diamonds, and graphite
13. A combination of decaying organic materials used to improve soil fertility
14. A resource that can be reused
15. The physical and biological factors that influence the life of an organism
16. A gas that absorbs ultraviolet radiation
17. A region or area where a particular species of animal or plant is found