waves

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Across
  1. 1. Waves A mechanical wave is a wave that must travel through some sort of matter called a medium. Mechanical waves cannot travel through a vacuum like outer space.
  2. 3. The wavelength of a wave is the distance between two corresponding points on back-to-back cycles of a wave. For example, between two crests of a wave.
  3. 7. The trough is the lowest part of the wave. The opposite of the trough is the crest.
  4. 8. A transverse wave is a wave where the disturbance moves perpendicular to the direction of the wave.
  5. 9. Diffraction is when a wave remains in the same medium, but bends around an obstacle.
  6. 12. The speed of a wave is a measure of how fast the disturbance of the wave is moving. The speed can be dependent on the type of medium that a wave is moving through.
  7. 13. The change in direction and wavelength when a wave moves from one medium to another.
  8. 16. Interference is when one wave comes into contact with another wave.
  9. 19. A longitudinal wave is a wave where the disturbance travels in the same direction as the wave. Sound waves are longitudinal.
Down
  1. 2. The measure of the displacement of the wave from its rest position. The higher the amplitude of a wave, the higher its energy.
  2. 4. Waves - Electromagnetic waves are waves that can travel through a vacuum. They do not need a medium. Light is a type of electromagnetic wave.
  3. 5. The frequency of a wave is the number of times per second that a wave cycles. The frequency is the inverse of the period.
  4. 6. wave A standing wave is a wave that remains in a constant position.
  5. 10. The crest is the highest point of a wave. The opposite of the crest is the trough.
  6. 11. A wave is a traveling disturbance that moves through space and matter. Waves transfer energy from one place to another, but not matter.
  7. 14. The medium is the matter that a wave travels through.
  8. 15. The period of a wave is the time between wave crests. It is the inverse of the frequency.
  9. 17. Reflection occurs when a wave bounces off a boundary, changing direction but remaining in the same medium.
  10. 18. wave Sound waves are mechanical waves that are caused by a vibration. Sound waves can be heard by our ears.