Across
- 2. A colour between blue and yellow
- 7. A structure that helps plants to grow in a warm, sheltered environment
- 9. A gas that absorbs ultraviolet radiation
- 10. In danger of becoming extinct
- 13. A type of renewable energy
- 15. A material that is resistant to water and chemicals
- 16. A sphere made of land and water
Down
- 1. A resource that can be used over and over
- 3. A place with a lot of trees and plants
- 4. A component of organic molecules
- 5. Reducing waste and pollution
- 6. Used for drinking, washing, and growing food
- 8. Organic material that is broken down to enrich soil
- 10. The physical and biological factors that affect the life of an organism
- 11. The air around the Earth which contains oxygen and other gases
- 12. The average weather of a region over a period of time
- 14. To use something again after it has been used up