Sound and Light

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Across
  1. 7. The height of a wave or vibration; it determines volume.
  2. 9. A range of colors formed when light is bent or separated.
  3. 12. Allowing light to pass through clearly; see-through.
  4. 14. A curved piece of glass or plastic that focuses light.
  5. 15. A dark area created when an object blocks light.
Down
  1. 1. The bending of light as it passes from one substance to another.
  2. 2. A quick, back-and-forth motion of an object or particle.
  3. 3. The bouncing of light off a surface; it allows us to see objects.
  4. 4. How loud or soft a sound is; it's related to the amplitude of vibrations.
  5. 5. Not letting any light pass through; it's not transparent.
  6. 6. A sound that bounces back after hitting a surface.
  7. 8. A transparent object that can separate light into its colors.
  8. 10. How high or low a sound is; it's related to the frequency of vibrations.
  9. 11. The number of vibrations or waves per second; it determines pitch.
  10. 13. Vibrations that travel through the air and can be heard by the ear.