Across
- 3. Fairly even distribution in lower atmosphere
- 7. Ozone layer filters ultraviolet radiation
- 8. Depth varies by location in the troposphere
- 11. Mixture of gases, mostly nitrogen and oxygen
- 13. Early bacteria and plants released oxygen through this process
- 14. Factory and auto emissions release other variable gases
- 15. Temperature decreases with increasing altitude
- 17. Nitrogen and oxygen in the atmosphere
- 18. Decreases with altitude in the troposphere
- 19. Released by early life as part of photosynthesis
Down
- 1. “Cold spot” and upper limit of surface-initiated turbulence
- 2. Altered by volcanic eruptions
- 4. Lowest layer in contact with the surface
- 5. Tiny solid and liquid particles in the atmosphere
- 6. Depth varies by latitude in the troposphere
- 9. Nearly all clouds form in this layer
- 10. Produced from natural and human sources
- 12. Gaseous impurities in the air
- 13. Ozone as a pollutant at the surface
- 16. Depth varies by season in the troposphere