Ava Puzzle 5

2. up to 25% of a clay body 4
7. melts at 2012-2192F 3
8. an oxide in which oxygen is present in the ratio of three atoms to two of another element 14
13. Size and volume increase in small increments 17
14. hit or knock firmly with a dull sound 18
16. a binary compound of oxygen with another element or group 13
18. Different Fluxes that do not act alike 6
20. a mineral form of silica powder used in ceramic glazes and clay bodies 11

1. Melts at 2102-2372F 5
3. Material that acts as a hardener in glass, glazes, clay s and all ceramic materials 7
4. an abundant rock-forming mineral that is colorless 20
5. made of four componets 1
6. transformation of existing rock types 16
9. Often used in clay bodies instead of grog or augment grog 9
10. Clay that grows smaller as it's fired 19
11. a raw material for making ceramics 10
12. a crystalline form of silica 12
15. produced by or subjected to sintering 15
17. A form of quartz that appears glassy and has no preferred way of breaking 8
19. Alters the vitrification temperature of the clay 2