Transparent brittle materials {glass}| can have different-length bonds and low thermal expansion. Sand is silicon dioxide. To make glass, melted sand receives small amounts of soda and lime at 2700 F. Melted sand is clear solid but is not crystalline. Glass does not melt at one temperature but becomes more fluid over temperature range. People can cut, blow, shape, and mold hot glass. Drawing molten glass through shaped boats floating in melted glass makes glass sheets. The glass cools slightly and then vertical rollers make it have equal thickness.
Physical Sciences>Chemistry>Inorganic>Chemical>Molecule>Kinds
5-Chemistry-Inorganic-Chemical-Molecule-Kinds
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Date Modified: 2022.0224