Earth Crossword

Advanced Earth Day-themed Crossword Puzzle

1. The contamination of soil, air, or water by human activities
2. A mixture of gases that forms the Earth's atmosphere
3. In danger of becoming extinct
4. A mixture of decaying plant and animal matter used to enrich soil
5. Often used in place of glass, metal, and wood
6. The conversion of forests to other land uses
7. A layer of gases that surrounds a planet or moon
8. Produced by a living organism
9. A structure with walls and roof made of a translucent material to let in sunlight and heat
10. A light, gentle flow of air
11. The typical weather patterns of a region
12. Place where a species can exist
13. A colorless, tasteless, odorless liquid
14. The physical universe, including plants, animals, and landscapes
15. Transforming waste into new items
16. A layer in the atmosphere which shields us from ultraviolet radiation
17. A thick grouping of trees, shrubs, and other plants
18. Fith largest planet in the solar system
19. A tall plant with a single stem and many branches
20. A component of carbon dioxide