ENERGY

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Across
  1. 2. travels in waves
  2. 3. there's a bomb named after it
  3. 5. phone,tv,tablet[etc]
  4. 6. fire or heat
  5. 9. usually in a lab
Down
  1. 1. stored energy
  2. 4. gears
  3. 7. the suns rays have this
  4. 8. energy of motion