Cycles

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Across
  1. 5. the liquid that all living organisms drink.
  2. 7. clouds get too heavy from the droplets and release rain.
  3. 8. an odorless nonreactive gas that forms about 78 percent of the earth's atmosphere.
  4. 9. something that is repeated forever.
Down
  1. 1. water vapor becomes tiny droplets and forms clouds.
  2. 2. water is heated and becomes vapor.
  3. 3. the cycle that show how a substance is renewed by bacteria and involves nitrates and nitrites.
  4. 4. the cycle that shows how a substance goes through organisms, into the ground, and into the atmosphere.
  5. 6. the cycle that shows how weather is formed, and how it becomes vapor and droplets.
  6. 9. a material that makes up all living things.