science crossword...

2. the lowest points on a transverse wave.
5. where the particles in the medium are closest together.
7. this is the transfer of energy by a wave to the medium through which it travels.
9. a wave that can travel through empty space and through matter.
10. where the particles in a medium move parallel to the direction that the wave travels.
13. it is the bouncing of a wave off a surface.
16. the _ of a wave is the distance from one point on a wave to the same point on the next wave.
17. the highest point on a transverse wave.
18. a disturbance in water.
20. the _ of a wave in the maximum distance that the wave moves.

1. when a wave is reflected from a surface, the angle of reflection is equal to the angle of incidence.
3. it is the passage of light through an object.
4. ____ eccurs when waves that overlap combine forming a new wave.
6. the regions of a longitudinal wave where the particles are the farthest apart.
8. a wave in which the wave is perpendicular.
11. what is the change in direction of a wave that occurs as the wave changes speed when moving from one medium to another.
12. a material in which a wave travels.
14. the _ of a wave is the number of wavelengths that pass by a point each second.
15. wave that can only travel through matter.
19. the change in direction of a wave when in travels by the edge of an object or through an opening.