puzzle time

1234567891011121314
Across
  1. 4. mirror
  2. 5. corresponding points
  3. 7. when the peaks of the waves line up
  4. 9. the increase or decrease in the frequency
  5. 11. the maximum displacement of points on the wave.
  6. 12. radio waves
  7. 13. a waves passing from one medium to another
  8. 14. the waves on a string
Down
  1. 1. the spreading of waves
  2. 2. frequency of 450 Hz
  3. 3. when the peaks of the waves line up, this constructive interference
  4. 6. waves created as a result of vibrations between an electric field and magnetic.
  5. 8. the substance that transfers the energy or light from one substance to another.
  6. 10. sound waves