7th Unit 8 Week 3

2. A system that uses reflected sounds waves to locate and determine the distance to objects under water.
5. A wave that moves the medium at right angles to the direction in which the wave travels.
8. The lowest par of a transverse wave.
9. Effect: The change in frequency of a wave as its source moves in relation to an observer.
11. The distance between the crest of one wave and the crest of the next wave.
13. The small, tightly stretched drumlike membrane that separates the outer ear from the middle ear, and that vibrates when sound waves strike it.
15. The material through which a wave travels.
17. A repeated back-and-forth or up-nbd-down motion
18. The ability to do work or cause change.
19. The height of a transverse wave from the center to a crest or trough
20. A wave that moves the medium in a direction parallel to the direction in which the wave travels.

1. A snail-shaped tube in the inner ear that is lined with receptors cells that respond to sound.
3. A wave that appears to stand in one place, even though it is two waves interfering as they pass through each other.
4. The bouncing back of an object or a wave when it hits a surface through which it cannot pass.
6. An image formed using reflected ultrasound waves.
7. The highest par of a transverse wave
10. A narrow region leading from the outside of the human ear to the eardrum.
12. A point of maximum amplitude on a standing wave.
14. The ratio of the mass of a substance to its volume.
16. The number of waves passing a given point each second.