Chapter 5 6th grade

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Across
  1. 2. nitrogen sunlight pollution
  2. 4. running water power
  3. 6. can be replaced
  4. 7. tectonic activity power plant
  5. 9. mineral rocks
  6. 10. uranium
  7. 11. replanted vegetables
  8. 12. energy from the Sun
Down
  1. 1. once they're gone they're gone
  2. 3. pH below 5.6
  3. 5. wood alcohol
  4. 8. cutting too many trees