Energy Crossword Puzzle

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Across
  1. 2. The process whereby atoms lose energy by radiation.
  2. 5. The bending of light as it passes through a medium
  3. 10. A tiny particle of electromagnetic radiation
  4. 12. How often a wave passes a particular point
  5. 13. A form of energy transfer. Also seen at the beach.
  6. 14. The area of physics that deals with electromagnetic forces
  7. 15. A solid, liquid or gas which things like sound require to travel through
  8. 16. The smallest unit of a chemical element that can exist. They make up everything.
  9. 17. A mirror or lens which "caves in"
  10. 19. Vibrations that travel through the air and allow us to hear stuff
Down
  1. 1. Describes how "loud" a wave is
  2. 3. The thing that makes things visible
  3. 4. When heat or electricity is transmitted through a material
  4. 6. When light bounces of a mirror
  5. 7. The distance between two crests of a wave
  6. 8. A mirror or lens which does not "cave in"
  7. 9. This is required to "do work"
  8. 11. When one thing moves from one place to another
  9. 18. The process where one thing is absorbed