Across
- 2. a kind of material which a wave travels in
- 3. measures the length of one cycle, or repetition
- 5. when you put a seashell to your ear, and you can hear the ocean
- 8. sound waves that have have frequencies greater than 20,000Hz
- 10. is equal to the number of cycles per unit of time
- 12. a thing that transfers energy to one place to the other
- 13. a wave that requires a medium
- 15. light waves travel without a medium
- 17. is equal to one cycle per second
- 18. sounds waves interact through an ...
- 20. wavelength divide by wave period
- 22. the measure of a particle in a medium
Down
- 1. a longitudinal that is caused by vibrations
- 4. when a particle moves in the same direction as a wave
- 6. a measure of how well a sound can be heard
- 7. when a wave moves up and down
- 9. reflect sound waves to find objects
- 11. the change of a frequency of a wave when the sound source is moving
- 14. the time required for one cycle
- 16. is one-tenth of a bel
- 19. bats use it to navigate
- 21. a system that uses sound waves to find a location
- 23. how high or low a sound is