Earth's Cycles Crossword

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Across
  1. 2. ______ are necessary to get nitrogen from the air->soil->plants
  2. 5. a key component of DNA and cell membranes
  3. 8. when water turns from vapor (gas) to liquid
  4. 10. the phosphorous cycle ______ ____ (2 words) include the atmosphere
  5. 12. organism that makes its own food using sunlight and carbon dioxide
Down
  1. 1. when things like fertilizer get into ponds and streams, causing the growth of algae and death of fish
  2. 3. the ____ cycle includes decomposition, combustion, absorption and respiration
  3. 4. water moving from liquid to gas
  4. 6. where water that is stored underground in soil and rock
  5. 7. examples rain, sleet, hail, snow
  6. 8. organism that eat other organisms
  7. 9. makes up 78% of the atmosphere
  8. 11. the 2nd largest place on our planet where carbon is stored
  9. 12. transpiration is when _____ release water vapor from their leaves