What is glass, how is it made?

Glass has been made by humans for about 4,500 years, and it generally consists of silica (sand), potassium or soda, lime, and occasionally some other chemicals. They are melted together and cooled at air temperature so that the material is hard, but has a smooth and flowing shape, more like a liquid. The precise recipe for glass changes from place to place — the chemistry and techniques are often closely guarded secrets.

In: Science
Answer provided by Yahooligans.com
related questions

Share This Site

Word of the Day

mirabilia: marvels; miracles.

Born on this day

August 25, 2016

1530 - Ivan The Terrible
1918 - Leonard Bernstein
1917 - Mel Ferrer
1930 - Sir Sean Connery
1938 - Frederick Forsyth
1942 - Howard Jacobson
1947 - Ann Archer
1949 - Martin Amis
1954 - Elvis Costello
1956 - Matt Aitken
1961 - Billy Ray Cyrus
1970 - Claudia Schiffer
www.Bridal-Shower-Games.com |Baby Shower Games | www.TwitterBackgrounds.org