Waves and Sound

6. The distance between two successive crests of a wave
7. This occurs when a wave bends around an object
9. The lowest point on a wave
12. A wave that contains an electric and a magnetic field and can travel through a vacuum
14. The maximum displacement of a wave from its resting position.
15. A wave that must travel through some sort of matter - it cannot travel through a vacuum like outer space
18. A measure of how fast a wave is moving
19. The unit for frequency
21. A wave that has rarefactions and compressions
22. The bending of a wave due to a change in speed as it enters a new medium

1. A unit used to measure the intensity of a sound
2. A device that uses the reflection of sound waves to locate objects or create images
3. A wave with a crest and trough
4. The reflection of a sound wave from a surface back to the listener
5. The number of times per second that a wave cycles
8. The highest point of a wave
10. The tendence of a system to oscillate (vibrate) with greater amplitude at certain frequencies
11. How high or how low something sounds
13. This occurs when a wave bounces off a boundary and changes direction
16. This occurs when one wave encounters another
17. Sound travels fastest in this type of medium
18. A longitudinal wave caused by a vibration which we can hear
20. The matter that a wave travels through