Using Minerals and Rocks Minerals and rocks are very useful to people. They are used in many different ways. Iron is a mineral we use to make the metal steel. We use steel to construct buildings and build bridges. Copper is a mineral used to make electrical wires and water pipes. Aluminum comes from a mineral called bauxite. We use aluminum to make a variety of objects, such as cans, tin foil and parts of cars, boats and bicycles.
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