4.10 Earth's Atmosphere Crossword

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