Vanderheyden Puzzle 1

1234567891011121314151617
Across
  1. 2. main component of clay?
  2. 5. ___ clay that has not dug up
  3. 6. what does silica form
  4. 9. the glassy substance that is most important occurs naturally as ___ rocks
  5. 10. ___ oxide is also a glass-former
  6. 11. clay is a combination of how many things
  7. 14. the quality of clay that allow it to move while maintaining its shape
  8. 15. the art of making things out of clay
  9. 17. what are mixed with silica
Down
  1. 1. what you use for your "glue" in your project
  2. 2. ___ clay that has been transported from the original location
  3. 3. rolling out wet clay into rope pieces
  4. 4. ___ clay can shrink up to 25%
  5. 6. where does clay come from?
  6. 7. what percent of the earth's crust is silica
  7. 8. ___ clay used for making drain pipes and brick
  8. 10. highly plastic secondary formed volcanic ash
  9. 12. ___ clay is the purest of primary clays
  10. 13. what do you use to "paint" your project
  11. 16. what is the formula for silicon dioxide