Sound & Light

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Across
  1. 3. clear, curved objects that focus light
  2. 5. how high or low a sound is
  3. 7. objects that take in and store solar energy
  4. 8. moves up, down, or to the side
  5. 12. letting light through
  6. 13. the gases around an object in space (on Earth this is air)
  7. 15. a space without air or any other matter (space that has no matter in it)
  8. 17. to make clear
  9. 18. a wave that moves through space, made of magnetic and electric fields
  10. 19. the part of your body that helps you breathe by pushing and pulling your lungs
  11. 20. all of space
Down
  1. 1. the power to work or to act
  2. 2. all the frequencies in which light waves, radio waves, and other similar waves can be found
  3. 4. not letting light through
  4. 6. can be seen
  5. 9. letting some light through
  6. 10. a musical note, the sound of one note
  7. 11. the number of waves moving in a certain space each second
  8. 14. the place from which something starts
  9. 16. any substance or material through which something (like sound waves) can move
  10. 17. how quickly something happens over and over again