1 All About Glass

All About Glass written by Julie Ellis

obsidian Glass has been used for a long time. The first glass came from a volcano. The fire inside the volcano was so hot that it made sand melt. When the sand got cold again, it had turned into glass. This glass is called obsidian. A long time ago, people used it as a tool.

Glass is made by heating sand with some other things. The sand melts in the hot fire. When the melted sand gets cold, it is glass. A lot of glass is used for doors or windows. windows

colored glass Glass can be made in pretty colors. Other things are added to the sand to make it turn different colors. Gold, silver, and copper can be used. Glass can be made blue, red, green, yellow, or any other color.

A glassblower blows through a tube into hot glass to make shapes. glassblower The glass stays in this new shape when it gets cold. This is how vases and other pretty things are made.

Some people like making new things out of pieces of colored glass. warm glass work They can melt pieces of glass together to make bright beads. This is called warm glass work.