If you melt quartz (also known as silica or silicon dioxide), it becomes a thick, gooey liquid. If you cool this liquid quickly, it forms a clear solid but if you cool it too slowly, the resulting solid is cloudy. The cloudy solid forms because slow cooling
A. allows the temperatures to get out of balance, so that the flow of heat within the material fills it with tiny white filaments.
B. permits stresses to build up within the liquid so that it experiences countless microscopic fractures as it hardens.
C. allows tiny quartz crystals to form and grow within the supercooled liquid as it hardens.
D. gives the chemicals time to react and produce tiny white particles within the colorless solid.
Answer:C
If you melt quartz (also known as silica or silicon dioxide), it becomes a thick, gooey liquid. If you cool this liquid quickly, it forms a clear solid but if you cool it too slowly, the resulting solid is cloudy. The cloudy solid forms because slow cooling
A. allows the temperatures to get out of balance, so that the flow of heat within the material fills it with tiny white filaments. B. permits stresses to build up within the liquid so that it experiences countless microscopic fractures as it hardens. C. allows tiny quartz crystals to form and grow within the supercooled liquid as it hardens. D. gives the chemicals time to react and produce tiny white particles within the colorless solid.