Waves Sound and Light Crossword Puzzle

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Across
  1. 3. outward
  2. 5. inward
  3. 6. used for microwaves
  4. 8. water
  5. 9. nuclear root
  6. 10. solar root
Down
  1. 1. water root
  2. 2. from the earth
  3. 4. sun
  4. 7. atomic nucleus