Sound and Light

12345678910111213
Across
  1. 3. When you look in the mirror you see your…
  2. 4. describes how high or low a sound is
  3. 8. the height of the wave
  4. 9. … happens when light changes direction
  5. 11. charge flow from one place to another in circuit
  6. 13. refract light inward toward a focal point
Down
  1. 1. magnetism developed by a current
  2. 2. Range of colours
  3. 5. vibrations on a string and ripples on the surface of water
  4. 6. the distance between wave peaks
  5. 7. You need… to see in the dark
  6. 10. the number of times a value occurs in a set of data
  7. 12. curves inward