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Sand and other minerals are first shoveled into a blazing hot furnace. The intense heat fuses the mixture and melts it into liquid. The resulting molten liquid glass can be blown, molded, poured, and pressed into different shapes, such as windows, ornaments, and lenses. The addition of lead
Glass is made of sand This is not transparently obvious. It’s strange to imagine grainy sand producing smooth glass, but sand is the main ingredient in the glass-making process. And it’s nothing new. Ancient Egyptians made glass beads back in 3500 bce. Created in 1966, Kevlar is a flexible synthetic (man
TRUE or FALSE? SUPERSTRONG SYNTHETIC
US_286_287_309600_Materials.indd 286 19/12/17 3:49 pm
