Advanced Earth Day-themed Crossword Puzzle
Listed Items
- 1.  A layer of gases that surrounds a planet or moon
 
- 2.  A nutrient-rich mixture of decaying organic matter
 
- 3.  Liquid form of H2O
 
- 4.  Transforming waste into new items
 
- 5.  The contamination of soil, air, or water by human activities
 
- 6.  A natural movement of air in the atmosphere
 
- 7.  The loss of trees due to human activity
 
- 8.  A mixture of gases that make up the Earth's atmosphere
 
- 9.  Often used in place of glass, metal, and wood
 
- 10. A thick grouping of trees, shrubs, and other plants
 
- 11. A layer in the atmosphere which shields us from ultraviolet radiation
 
- 12. Fith largest planet in the solar system
 
- 13. In peril of being lost forever
 
- 14. The basis of all organic molecules
 
- 15. Made from living or once-living organisms
 
- 16. Area that offers necessary resources
 
- 17. A tall perennial woody plant with a single main stem and many branches
 
- 18. A structure with walls and roof made of a translucent material to let in sunlight and heat
 
- 19. The prevailing weather conditions of a region
 
- 20. The physical world and all its phenomena, including plants and animals