Planet Earth Crossword Puzzle

Advanced Earth Day-themed Crossword Puzzle

1. The physical world and all its phenomena, including plants and animals
2. Using materials again and again
3. A component of carbon dioxide
4. A building made of glass or plastic to trap heat from the sun and create a warm environment
5. A light, gentle flow of air
6. At risk of disappearing
7. The air or gas which encircles a celestial body
8. The contamination of soil, air, or water by human activities
9. Fith largest planet in the solar system
10. A gas which absorbs harmful UV radiation
11. Liquid form of H2O
12. A nutrient-rich mixture of decaying organic matter
13. The invisible gas that surrounds the Earth
14. The loss of trees due to human activity
15. Refers to molecules that contain carbon
16. Location that meets the needs of a species
17. A large area of land that is densely covered with trees
18. The average weather of a region over a long period of time
19. Often used in place of glass, metal, and wood
20. A botanical organism with a woody stem