Electromagnetic Puzzle

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Across
  1. 3. How we see the skeletal system
  2. 5. Lowest frequency wave type
  3. 7. In remote controls
  4. 8. The range of wave types
Down
  1. 1. Wave type that can cause sunburn
  2. 2. Highest frequency wave type
  3. 4. Used for heating up food
  4. 6. The only wave type we can see