Energy

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Across
  1. 5. that travel through air or other medium
  2. 9. object that allows light waves to pass through
  3. 12. measured as distance between two adjacent crests
  4. 15. rise in temperature causes atoms and molecules to move faster
  5. 17. light waves bounce off something else
  6. 19. transverse wave consisting of electric and magnetic fields
  7. 21. light waves bend
Down
  1. 1. heat transfer in a fluid
  2. 2. increasing size of object when heat causes molecules to move farther apart
  3. 3. heat transfer through a vacuum
  4. 4. wave in which particles of the medium vibrate at right angles
  5. 6. object that allows a few light waves to pass through
  6. 7. An object that does not allow light waves to pass through
  7. 8. Portion of electromagnetic spectrum visible by humans
  8. 10. Pitch
  9. 11. heat transfer by molecules touching
  10. 13. movement of energy from warmer substance to colder one
  11. 14. disturbance or vibration of medium
  12. 16. Materials through which a wave travels
  13. 18. perceived frequency of sound
  14. 20. Volume of a wave, measured in decibels