Name some things that are made of glass. Your list might include windows, bottles, eyeglasses, light-bulbs, drinking cups, baking dishes, and more!
Glass is a very useful material that’s been around for thousands of years; scientists have found artifacts of man-made glass objects dating all the way back to the Ancient Egyptians! Glass is an ideal material for many things because it’s made using naturally occurring resources. It’s also easy to shape and mold, and it’s stiff and rigid enough to be used as a container for other things. Plus, glass is clear, which makes it a great choice for things like windows and eyeglass lenses!!
Believe it or not, one of the key ingredients in the making of glass is sand! Glass is made when sand is mixed with the right amount of other special substances (like lime and sodium bicarbonate), and then heated up to a very, very hot temperature. The glass at this stage is molten (liquid) and after it cools a little, it is able to be molded into shapes. Making the shapes out of the hot liquid glass has to happen quickly – as it continues to cool further, it begins to stiffen so the shapes must be made before it becomes too hard! Once it’s in the desired shape, it is cooled further and then ready to be used!