Across
- 3. A large area dominated by trees.
- 6. Contamination.
- 8. A gradual increase in the overall temperature of the earth's atmosphere.
- 12. Absorbed from the air by plants in photosynthesis.
- 13. What humans need to breathe to survive.
- 14. The star at the center of the Solar System.
Down
- 1. Where seeds are placed to grow.
- 2. Supplies plants with the essential nutrients.
- 4. A natural flow of water, usually freshwater, flowing towards an ocean, sea or a lake.
- 5. Where an animal lives.
- 7. A breed of animal.
- 9. flow of gases on a large scale/bulk movement of air.
- 10. Absorbs harmful ultraviolet radiation from the sun.
- 11. What an animal hunts.