Energy Carriers - Waves

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Across
  1. 3. this carries energy but not matter
  2. 4. the direction of a longitudinal wave is ......... to the direction of its vibrations
  3. 6. the highest point in a transverse wave's cycle
  4. 7. the unit of frequency - one of these is equal to one cycle per second
  5. 8. a wave's .......... is the distance travelled by a given point on a wave per unit of time
  6. 10. this type of wave travels in a direction that is parallel to its vibrations
  7. 12. a longitudinal wave is made up of a series of ........ and rarefactions
  8. 15. a wave's ....... is a measure of the size of its vibrations
  9. 16. this type of wave requires a medium for transmission
  10. 17. waves carry this from one place to another
  11. 18. electromagnetic waves can travel through space as ........... aren't involved in their transmission
  12. 21. a wave's......... is the number of wave cycles passing a given point per unit of time
  13. 22. a type of electromagnetic wave detected by our eyes
Down
  1. 1. this type of wave travels in a direction that is perpendicular to its vibrations
  2. 2. a wave's ............. is the length of one complete wave cycle
  3. 4. the direction of a transverse wave is .............. to the direction of its vibrations
  4. 5. a type of mechanical wave, detected by our ears
  5. 9. a wave's .......... is the time it takes to complete one cycle
  6. 11. a destructive wave caused by an underwater earthquake
  7. 13. this type of wave, which consists of vibrating electric and magnetic fields, radiates from stars
  8. 14. electromagnetic waves can pass through one of there - but mechanical waves can't
  9. 19. the lowest point in a transverse wave's cycle
  10. 20. the source of most of the electromagnetic waves reaching the Earth from space