Holiday Physics Crossword Puzzle

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Across
  1. 4. Santa stops at houses _-ically.
  2. 7. Put some Christmas cookies in the _ for the pigs!
  3. 8. On Christmas Eve, Santa is _ (wave) around the world.
  4. 10. Your Christmas lights must be turned on to show the angle of incidence and reflection are equal, it's the _ (of reflection)!
  5. 13. Stop the Grinch's _ of Christmas!
  6. 14. Santa _-ally wears a red suit and hat for the holidays.
  7. 15. There's Mr. Snowman, just _ (wave) in the snow.
  8. 17. The elves received _ to wear on their sweaters.
  9. 18. Before the party, I check my (angle of) _ in the car.
  10. 19. The maximum height of the sound wave from the normal, made when Santa yells at his reindeer.
  11. 20. If Santa's journey on Christmas Eve is a standing wave, what do you call one of places he always goes?
Down
  1. 1. Two carolers meet and sing together, becoming friends. _ interference
  2. 2. The high and low notes of Christmas songs each have a different _.
  3. 3. The sound of bells from Santa's sleigh travels in _ waves.
  4. 5. Here comes Santa Claus, here comes Santa Claus... Hear those sleigh bells jingle j_... (of incidence)
  5. 6. A package from Santa's sleigh falls and is lost in the ocean's _ waves.
  6. 9. Santa has to travel across all the continents, what a (wave)- _-ly journey!
  7. 11. Frosty the snowman, had to hurry on his way, but he _-d (pulse)goodbye...
  8. 12. The angry choir teacher comes and tells the children to stop carolling. _ interference
  9. 16. If Santa's journey on Christmas Eve is a standing wave, what are the places he switches up and visits once every few years called?