Cycles of matter

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Across
  1. 5. The first organisms to grow in an area undergoing ecological succession.
  2. 8. Cycle The combustion of coal, oil and natural gas is part of the _________
  3. 9. Water changes from a liquid to a vapor during
Down
  1. 1. Breaking down matter back into carbon dioxide and water
  2. 2. the process of burning fuel, such as oil
  3. 3. The recovery of Yellowstone National Park following the fires of 1998 is an example of
  4. 4. Water that soaks into the ground
  5. 5. During ___________ water moves from the atmosphere to the land and ocean
  6. 6. Succession The development of a community on bare, exposed rock is an example of
  7. 7. The gradual regrowth or development of a community of organisms over time
  8. 8. All biological molecules contain ___________