Maddie v Puzzle 7

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Across
  1. 2. wood, coal, oil etc, use up oxygen as they burn and can cause a what.
  2. 7. traditional unglazed red ware
  3. 10. what is the top layer of a bonfire kiln
  4. 11. potters use it to fire their pots.
  5. 14. what is the second to top layer of a bonfire kiln
  6. 17. metal coils do not give off smoke, the atmosphere in the kiln is what.
  7. 18. what is the bottom later of a bonfire kiln
  8. 19. what is the second to bottom layer of a bonfire kiln
  9. 20. as more heat is introduced than escapes, the temperature what
Down
  1. 1. heat is produced when electricity passes through metal coils.
  2. 3. heat comes from all around
  3. 4. what shape are most top loading kilns
  4. 5. some electric kilns have what in the floor as well as the side walls of the kiln
  5. 6. where can heat be lost in
  6. 8. heat comes from the burning wood, coal, oil, propane, natural gas, etc.
  7. 9. how many different shapes do kilns come in
  8. 12. heat can be carried away from what gas
  9. 13. when the atmosphere in the kiln is oxidizing it does not change the what of clay and glaze.
  10. 15. the oldest type of kiln, dating back more than 10,000 years.
  11. 16. these are necessary to remove harmful fumes