Carmela Sales 5th hour puzzle 1

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Across
  1. 2. to go through the transformation of substance to glass
  2. 4. the only substance that can achieve similar results to silica is ____ oxide
  3. 6. ___ clay vitrifies at 2100f and has high plasticity
  4. 8. a white primary clay that is an example of china clay
  5. 9. ____ clay is the type of clay that is found where it was formed
  6. 13. ___is a mixture of silica, aluminum oxide, and water
  7. 14. ball clay shrinks about ___ percent in the kiln
  8. 15. ____ clay is the type of clay that is found away from where it was formed
  9. 18. a mixture of silicone and an oxide
  10. 20. a hard glassy substance that is an integral part of clay
Down
  1. 1. a chemist would refer to clay as hydrated _____
  2. 3. silica melts at 1710 degrees Celsius to make a ___ glass
  3. 5. an oxide that can readily form glass
  4. 7. a common clay that is formed from ash and can be added to other clay to increase elastic
  5. 10. what is mixed with silica to bring down melting temperature?
  6. 11. there are many fluxes and only ___ silica
  7. 12. The earth's ___ is 60% silica
  8. 16. ___ clay is one of the purest forms of primary clay and it has low plasticity
  9. 17. ___ of clay refers to how flexible it is
  10. 19. ____ clay is found under coal beds and is typically used for refractory or fire brick.