Heat, Light and Sound

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Across
  1. 2. Relating to an object that lets most light pass through
  2. 4. An object that heat can move through easily
  3. 7. Energy Form of energy that moves particles of matter
  4. 9. Relating to an object that lets some light pass through
  5. 11. The highness or lowness of a sound
  6. 13. The bending of light as it moves from one material to another
  7. 14. Relating to objects that don't let light pass through
  8. 15. The movement of heat between objects that are touching each other
  9. 16. The dark area that forms when an object blocks the path of light
Down
  1. 1. Amount of energy that a sound has
  2. 3. Measure of hotness and coldness
  3. 5. The bouncing of light off an object
  4. 6. A series of back and forth movements
  5. 8. Taken in by an object
  6. 10. An object that does not conduct heat well
  7. 12. The movement of thermal energy from hotter to cooler objects