Answer Key - Matthew Linoh

4. The downward dips in a long strand of holiday garland hanging between hooks.
5. How many wave cycles occur per second.
6. Bending of light passing through a glass ornament filled with liquid.
13. Christmas lights passing through frosted windows and spreading light.
15. Multiple strands of Christmas lights crossing paths.
17. Ripples moving across the surface of hot cocoa in a holiday drink.
18. A point on a standing wave that does not move.
20. Increased sound volume when several carolers sing the same note together.
21. The maximum height of motion when snow is shaken inside a snow globe.
22. Particles move perpendicular to wave travel.
23. A point on a standing wave with maximum motion.
24. Time for one full wave cycle.

1. Multiple holiday songs play at the same time.
2. Particles move parallel to wave travel.
3. A stretched ribbon used for Christmas decorations creating a fixed vibration pattern.
7. Angle between incoming ray and the normal.
8. Imaginary line perpendicular to a surface.
9. Angle between reflected ray and the normal.
10. Waves cancel each other out.
11. Sound from sleigh bells spreading through a snowy street.
12. The star placed at the highest point of a Christmas tree.
14. Incoming and reflected angles are equal.
16. Distance between repeating points on a wave.
19. A single disturbance traveling along a string of Christmas lights after one shake.