Across
- 3. A type of wave where vibrations are at right angles to the direction the wave travels.
- 4. The time it takes for one complete wave to pass a point.
- 5. The bending of a wave as it passes into a different medium.
- 6. A wave used in hospitals to see inside the body.
- 8. The number of waves passing a point in one second.
- 10. The type of wave used to broadcast sound and TV signals.
- 11. A space where there is no matter and electromagnetic waves can travel.
- 16. The part of a longitudinal wave where particles are closest together.
- 18. How fast a wave travels through a medium.
- 19. A wave that does not need a medium to travel through.
- 21. The spreading out of waves when they pass through a gap.
- 23. When a wave bounces back after hitting a surface.
- 24. The distance between one wave peak and the next.
- 25. A wave used for cooking and satellite communication.
Down
- 1. A type of electromagnetic wave that causes skin to tan or burn.
- 2. A wave where vibrations are parallel to the direction the wave travels.
- 7. The part of a longitudinal wave where particles are spread out.
- 9. A high-energy wave used to kill cancer cells.
- 12. The height of a wave from its middle to the peak or trough.
- 13. The unit used to measure the frequency of a wave.
- 14. The type of electromagnetic wave that we can see.
- 15. A type of electromagnetic wave used in remote controls and heaters.
- 17. What waves transfer from one place to another without moving matter.
- 20. The material that a wave moves through.
- 22. A repeated movement back and forth, like in a wave.