Across
- 4. energy from the sun
- 7. variety of life on Earth
- 8. essential liquid for life
- 9. it absorbs CO2 and gives O2
- 13. big blue areas that covers most of the Earth
- 15. the air around the Earth
Down
- 1. a material that stays in nature for years
- 2. air that moves; can make energy
- 3. land next to the ocean
- 5. a way to travel without pollution
- 6. using things again to reduce waste
- 10. our planet
- 11. a place with many trees and animals
- 12. a pollinator that helps plants grow
- 14. a fossil fuel