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When were plate (flat) glass windows invented?
In the 17th century
Is glass a solid?
No, amorphous solid
How many % of glass can we recycle?
It's 100% recyclable
Name 5 things made of glass:
Glass, glasses, window, vase, mirror...
What's this job?
Glassblower
When was the first glass object created by humans?
About 4000 years ago
How is this called?
Bulletproof glass
Where is the longest glass bridge?
In Vietnam
Where is located the world's largest aquarium window?
In Zhuhai, China
How this is called?
Stained glass
At What Temperature Does Glass Melt?
Around 1500°C
What glass is made from?
Limestone, sand and sodium carbonate


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