Glass
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Chemical Compounds: |
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What is glass
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Glass is, according to the dictionary, a hard, transparent material,
made out of molten sand, chalk and soda. These three compounds are the main
ingredients of glass. Together with: dolomite, alum soil and other
ingredients it forms the glass that we use in our daily life. |
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History
Obsidian |
The first glass came in existence in the desert millions of years ago. Extreme heat melted the sand into a thick mass. Also through vitrification
of lava a type of glass came into being now known as obsidian. Man discovered glass around 5000 BC. Around 100 years after BC people
started to make clear glass. In Syrië they discovered
that you could blow glass through a hollow pipe. A technique was developed to
produce higher quantities. In these days Syrië was
a part of the |
