science

5. The highness or lowness of a sound, which is determined by the frequency of the sound waves.
6. a system that uses reflected sound waves to detect and locate objects underwater.
7. The bending of waves around a barrier.
11. The ability of two or more waves to combine to form a new wave.
13. The distance between identical points on two adjacent waves; for example, the distance between two crests or two troughs.
15. In a wave, the distance from the rest position of the medium to either the crest or trough.

1. The number of wave crests that pass a point during one second; expressed in hertz.
2. In compressional waves, the dense area of the wave.
3. The bending of waves, caused by changing their speed.
4. Occurs when a wave strikes an object and bounces off.
8. In compressional waves, the less dense area of the wave.
9. The highest point of a wave.
10. the lowest point of a wave.
12. A material through which a wave travels.
14. The tendency of an object to vibrate at the same frequency as another vibrating source.