Glass is an everyday thing that people use all the time. You might not even know it’s there! Mirrors, windows, and some tables are made of glass. But how is glass made?
Glass is made of liquid sand. It is heated to 1700°C (3090°F). After it is heated to this temperature, you can shape into whatever you want. As long as you have a lot of patience and skill.
https://www.explainthatstuff.com/glass.html
This is related to engineering because glass is used for many things. Glass is used in buildings, machines, etc. and because of it, other things can be made.
