Iron is made from iron ore

Iron is made from iron ore

Iron is made from iron ore, a common material found all over the world. Iron iscombined with carbon and a small amount of other chemical elements. Then it is heated to make steel. This is more durable than pure iron.

It may surprise you to know that glass is made of sand.  In a glass work, sand is mixed with other substances, and heated until it melts. As it cools it becomes thicker, and can be molded or blown into shape before it hardens to form glass. Metal containing compounds can be added to make colored glass.

Rubber is a natural material-it is solidified latex, which is the sap of a rubber tree. Its properties can be changed to make it stronger and more elastic, by process called vulcanization. This involves heating the rubber under pressure with Sulphur.