Across
- 2. A consequence of climate change due to lack of rain
- 3. Process of the breakdown of dead material.
- 5. Natural feature that released gases into the early atmosphere.
- 7. The layer of gases surrounding Earth.
- 8. Day-to-day atmospheric conditions.
- 10. A consequence of climate change due to rising sea levels
- 12. Process that releases carbon dioxide from living organisms.
- 15. Organism that breaks down dead material.
- 18. Process that removes carbon dioxide and releases oxygen.
- 19. Removal of microorganisms from water, using chlorine, UV or ozone.
- 21. A greenhouse gas produced by cattle and decomposers.
- 22. Pollutant that can contribute to acid rain (____oxide).
- 23. Gas needed for respiration.
- 24. Toxic gas produced by incomplete combustion.
Down
- 1. Greenhouse gas used by plants in photosynthesis.
- 4. Average weather conditions over many years.
- 6. The first phase of treating waste water, removes larger solid objects
- 9. Relationship between two variables.
- 11. Warming caused by infrared-trapping gases (____ effect).
- 13. The most abundant gas in modern air.
- 14. Chemical reaction involving burning in oxygen.
- 16. Very small solid carbon released during incomplete combustion.
- 17. Organism that feeds on dead organic matter.
- 20. Process of removing salt from seawater.