Renewable energy

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Across
  1. 3. Process of melting together
  2. 6. elementary particles.
  3. 8. made up of one or more atom
  4. 9. A chemical element
Down
  1. 1. changes color
  2. 2. Remote control center of cell
  3. 3. A nuclear reaction
  4. 4. The unit of watts
  5. 5. Cell that contains chromosome's
  6. 7. building blocks of matter.