
Why is glass see-through?
Brains On! Science podcast for kids
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Making Glass From Scratch
Making glass from scratch is not only hot, it's also a bit of a magic trick. You start with gritty, silica sand and turn it into smooth, clear glass. A glass expert says you have to get the sand much, much hotter than your stove. It has a very high melting point - up to four thousand degrees fahrenheit.
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