Earth Crossword Puzzle

Advanced Earth Day-themed Crossword Puzzle

1. A tall plant with a woody stem and branches
2. A molecule that is toxic to many organisms
3. Air in motion
4. To use something again after it has been used up
5. The invisible substance that fills the atmosphere
6. The environment or area in which an organism lives
7. A structure that traps heat and light from the sun to grow plants in a controlled environment
8. A resource that can be used over and over
9. A building block of organic molecules
10. The complex of physical, chemical, and biotic factors that act upon an organism or an ecological community
11. Harmful substances released into the air, water, or soil
12. A wooded area, usually with a lot of trees and plants
13. A mixture of decaying organic material used to improve soil quality
14. A protective layer of gas around a planet
15. The physical world and all living things
16. Used for drinking, washing, and growing food
17. Third planet from the sun
18. Derived from living sources
19. Reducing waste and pollution
20. Long-term weather patterns in a certain area
21. A type of renewable energy
22. In danger of becoming extinct
23. A material that is often used for packaging