NS Flashcards
glass
1
Q
when was the first glass discovered
A
millions of years ago
2
Q
how do scientists think
A
nature
3
Q
when can sand turn into glass
A
when lightning hits the sand
4
Q
what is glass made of
A
silica,soda and lime
5
Q
is glass a solid
A
yes
6
Q
what’s another word for cooled and heated again
A
annealed
7
Q
what is the oven called
A
a Lehr
