Baxter Ceramics Puzzle 5

3. consists of the three mineral types- clay, silica, and feldspar
4. inversion the sudden volume change in crystalline quartz particles experience as they pass up and down through 573C.
7. a fault that can occur during the firing of ceramic
10. a crystalline form of silica
12. alters the vitrification of the clay
15. pots and other articles made from clay hardened by heat
17. having the structure and form of a crystal
18. shrinkage comparative indicator of the degree of vitrification
20. a micro crystalline form of quartz and is a completely different physical appearance
21. used in pottery and sculpture to add a gritty, rustic texture, it reduces shrinkage and aids even drying

1. a mineral form of silica powder used in ceramic glazes and clay bodies
2. the state of being thick, sticky, and semi fluid in consistency, due to internal friction
5. the material that acts as a hardener
6. tension the tendency of liquid surfaces to shrink into the minimum surface area possible
8. expansion the tendency of matter to change its shape, area, volume, and density in response to a change in temperature
9. sand often used in clay bodies
11. derived from or containing glass
13. where ceramics and pottery are fired
14. action it collapses the porosity and bonds the unmelted ceramic particles to each other by making a eutectic system
16. The practice of holding the kiln at final firing temperature for a period of time
19. body made from clay, fluxes, hardeners and openers