Across
- 5. Hottest region of the atmosphere
- 7. Contains the ozone layer
- 8. The process of converting waste materials into new materials and objects
Down
- 1. The layer of gases surrounding Earth
- 2. Highest content of gas in the atmosphere
- 3. water on the earth’s surface
- 4. Non-living chemical and physical parts of the environment
- 6. Coldest zone of the atmosphere