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A glass ball with coloured glass shapes inside
Edo-Kiriko, a traditional cut glass craft in Asakusa, Tokyo, Japan. The glass has two layers, a coloured layer outside a clear layer.

Glass is a hard material that can be made in many shapes. It is usually transparent, but it can also be made in colours. Glass is mainly made of silica; glass made of silica only is called silica glass.

Glass used to make windows and bottles is a specific type called soda-lime glass, composed of about 75% silicon dioxide (SiO2), sodium oxide (Na2O) from sodium carbonate (Na2CO3), calcium oxide, also called lime (CaO), and several minor additives.  view more...


 KidzTube            
LET IT GO (Disney's Frozen) on wine glasses, pots and pans

LET IT GO (Disney's Frozen) on wine glasses, pots and pans
uTug: Micro Robot Pulls 2000 Times Its Weight On Glass

uTug: Micro Robot Pulls 2000 Times Its Weight On Glass
How to watch the solar eclipse if you don't have special glasses

How to watch the solar eclipse if you don't have special glasses
How I broke a wine glass with my voice (using science!)

How I broke a wine glass with my voice (using science!)
more videos...