Light waves

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Across
  1. 5. light is also a ________ type of wave and energy
  2. 8. An object that allows all light to pass through is said to be ________.
  3. 9. Anything you see is ______ back to your eyes.
  4. 10. Light waves do not need a ____ to travel unlike sound waves which require a ______.
Down
  1. 1. An object that does not allow light to pass through is said to be ________.
  2. 2. When all the colors of the rainbow spectrum are combined, we see ______
  3. 3. When all the colors of the rainbow spectrum are absorbed, we see _____
  4. 4. light is a what?
  5. 6. ______ colors that are absorbed by an object hold more heat and lighter colors are reflected and don’t hold as much heat.
  6. 7. _______ is the only part of the electromagnetic spectrum that humans can see.