Science Vocabulary

5. the quality of a sound made by the number of vibrations (the highness or lowness of a sound)
8. material through which waves travel
9. waves that move the medium parallel to the direction in which the waves travel
13. the location of objects by reflected sound, in particular that used by animals such as dolphins and bats
15. the distance between two crests or troughs/ the distance between two corresponding parts of a wave
17. a wave that transfers energy perpendicular to its medium. The energy moves in one direction while the medium moves at a right angle to it
18. the highest point of a transverse wave
19. the lowest point of a transverse wave
20. a sound or series of sounds caused by the reflection of sound waves from a surface back to the listener
21. vibrations that travel through the air or another medium and can be heard when they reach a person’s or animal’s ear

1. a repeated back and forth or up and down motion
2. a disturbance that carries energy through matter or space
3. the apparent bending of waves around a small obstacle
4. a wave that requires a medium in which to travel and carry energy
6. measure of wave energy; the distance between a wave’s resting point and the top or crest of a wave
7. an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other
10. the ability to do work
11. parts where the waves are close together
12. the change in direction of a wave due to a change in its medium
14. parts where the waves are spread out
16. to bounce off