science

3. reflected sound wave
4. change of pitch when a sound source is moving in relation to an observer
5. animal uses to locate an object by means of reflected sound
6. rapid back and forth motion that can occur in solids, liquids, or gases
8. matter where a wave travels
9. bouncing of a wave off a surface
11. system that uses direction of sound waves to find underwarter objects
13. a wave that can only travel through matter
16. study of how sound interacts with structures
18. highest point on transverse wave
19. amount of sound energy that passes through a square meter of space in one second

1. collection of reflected sounds from the surface in closed space
2. passage of light through an object
7. waves that overlap combine forming a new wave
10. lowest point on transverse wave
12. perception of high or low a sound seems
14. distance that transfers energy from one space to another without transferring matter
15. region of a longitudinal wave where the particles are farthest apart
16. transfer of energy by a wave to the medium through which it travels
17. longitudinal waves that can only travel through matter