Cycles Crossword!

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Across
  1. 2. Water gathers in oceans, lakes, and rivers
  2. 4. Process where organisms release carbon dioxide
  3. 5. Process that converts nitrogen gas into usable forms for plants
  4. 8. Plants release water vapor into the air
  5. 9. Liquid water changes into water vapor (gas)
  6. 10. Dioxide Gas plants use in photosynthesis
  7. 11. Main gas in the atmosphere (about 78%)
  8. 12. Fuels Coal, oil, and natural gas that release carbon when burned
  9. 13. Nitrogen compound found in soil after decomposition
  10. 14. Process plants use to make food using sunlight, water, and carbon dioxide
  11. 15. Breakdown of dead organisms releasing carbon into the environment
Down
  1. 1. Water vapor cools and turns into liquid, forming clouds
  2. 3. Process that returns nitrogen gas back to the atmosphere
  3. 6. Water falls from clouds to Earth (rain, snow, sleet, hail)
  4. 7. Process where bacteria convert ammonia into nitrates