crossword puzzle

5. lowest point on transverse wave
6. matter where a wave travels
9. a wave that can only travel through matter
11. region of a longitudinal wave where the particles are farthest apart
13. distance that transfers energy from one space to another without transferring matter
14. change of pitch when a sound source is moving in relation to an observer
17. waves that overlap combine forming a new wave
19. transfer of energy by a wave to the medium through which it travels
20. rapid back and forth motion that can occur in solids, liquids, or gases

1. study of how sound interacts with structures
2. system that uses direction of sound waves to find underwarter objects
3. collection of reflected sounds from the surface in closed space
4. longitudinal waves that can only travel through matter
7. bouncing of a wave off a surface
8. highest point on transverse wave
10. animal uses to locate an object by means of reflected sound
12. passage of light through an object
15. perception of high or low a sound seems
16. amount of sound energy that passes through a square meter of space in one second
18. reflected sound wave