1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration

Choose a Page:*What is glass made from?*Who first made glass?Can plastics be recycled?What are phosphates used for?Can metals be recycled?Which trees make the best timber?What is an alloy?What are the different types of pl...How is artificial silk made?What is chipboard?What natural fibres are used to ma...Why does concrete set hard?What material is the Statue of Lib... What is glass made from? Glass is made from sand, limestone, soda ash (sodium carbonate), and recycled waste glass. Boric oxide is added to make heat-resistant glass (called Pyrex). The ingredients are heated to a high temperature in a furnace until they melt together. The molten glass from the furnace cools to form sheets, or may be moulded to make objects such as bottles. Glass is used to make thousands of items, from window panes to aerial shields in space vehicles.   Previous: Back Book: 1001 Section: Science and Technology Chapter: Materials