Study for Quiz

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Across
  1. 4. the brightness of light is determined by the _________ of the wave.
  2. 5. different ________ helps us see differnt colors
  3. 8. what is the opposite word of natural.
  4. 9. what is it called when an object soaks up the light?
  5. 14. what type of energy is light?
  6. 15. a pattern of symbols
  7. 17. how many colors is white light made up?
Down
  1. 1. what do we call actions we use to communicate?
  2. 2. when an object reflects all colors of light, it appears ______.
  3. 3. what type of code uses two signals?
  4. 6. Light rays travel in _____ lines until they collide withe something.
  5. 7. who invented Morse Code?
  6. 10. what type of waves do NASA use to communicate with spacecraft?
  7. 11. what is another word for 'bent'.
  8. 12. what type of light can we only see with our own eyes?
  9. 13. when an object reflects almost no light, it appears _________.
  10. 16. what is it called when a light wave bounces off an object's surface it cannot pass through?