NS Flashcards by Arya Mathew

Q

when was the first glass discovered

A

millions of years ago

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Q

how do scientists think

A

nature

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Q

when can sand turn into glass

A

when lightning hits the sand

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Q

what is glass made of

A

silica,soda and lime

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Q

is glass a solid

A

yes

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Q

what’s another word for cooled and heated again

A

annealed

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Q

what is the oven called

A

a Lehr

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