science test vocab

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Across
  1. 2. no pollution
  2. 3. solar energy
  3. 5. dung
  4. 8. air
  5. 9. released from a atom
Down
  1. 1. rise and fall of sea level
  2. 4. fossil fuels
  3. 6. nonrenewable energy
  4. 7. sun energy
  5. 10. heat from the ground