science crossword puzzle

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Across
  1. 3. Lowest frequency waves
  2. 4. The only waves we can see
  3. 5. Shorter wavelength than visible light used to see the skeletal system.
  4. 7. Describes all of kinds of light, including those the human eye cannot see.spectrum
  5. 8. Longer wavelengths than infrared waves and are used to heat food quickly.
Down
  1. 1. Moderate frequency and used in remote controls
  2. 2. Shorter wavelength than visible light but longer wavelengths than x-ray.
  3. 6. Highest frequency and is often used to fight cancer.