Words of science

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Across
  1. 2. see through
  2. 7. pink floyd album cover
  3. 9. not see through
  4. 10. what is with you at all times with light
Down
  1. 1. kinda see through
  2. 3. what the colour black does
  3. 4. what the colour white does
  4. 5. you can see
  5. 6. you cant see
  6. 8. the colourful arch