Glass

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Across
  1. 6. Glass is placed in a liquid and has NO visible outline
  2. 7. The ratio of the speed of radiation
  3. 9. Two sheets of glass together with plastic
  4. 11. Single item from a larger group
  5. 12. Natural form of glass
  6. 13. The primary ingredient
  7. 14. Commonly called crystal
  8. 17. The circles/round of the glass
  9. 18. Has an irregular atomic structure
  10. 19. The most common glass
  11. 20. Person-specific attributes
Down
  1. 1. Stronger than ordinary glass
  2. 2. The lines of the glass
  3. 3. Added to reduce the melting point of sand
  4. 4. From the manufacturing process
  5. 5. The glass bends before it snaps and breaks
  6. 8. To prevent the glass from becoming soluble(H2O)
  7. 10. An object has the exact same density as the surrounding fluid
  8. 15. D= M/V
  9. 16. application of science to matters of criminal justice