Light Vocab

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Across
  1. 4. allows no light to pass through
  2. 5. allows some light to pass through
  3. 7. is a form of energy
  4. 8. dark shapes that appear when light sources are blocked
Down
  1. 1. allows light to pass through
  2. 2. makes its own light
  3. 3. doesn't make its pwn light
  4. 6. a straight line of light