ABSTRACT
Materials or substances can be classified according to their origin, type, properties or uses. Since the beginning of human history, people have been using a variety of materials to help them in their daily lives. As technology progressed, the materials became more sophisticated, from the stone tools of the Neolithic people to the metal weapons of the Bronze and Iron Age people. Ensure children are aware that the word 'material' refers to all solids, liquids and gases, and not just fabrics. Anything made up of matter, occupying space and having a mass is a material. In terms of human survival, one of the most important natural materials is the soil. Most other natural materials derived from the physical environment of the Earth are the products of geological processes that have been operating in and on the crust of the Earth. Manufactured materials are made from raw materials that have been processed in a variety of ways.
