Raw Materials: It all starts with mixing specific ingredients like silica sand (for structure and clarity), soda ash (lowers melting point and adds stability), and limestone. Recycled glass is often included in the mix as well.

Discuss how and why you might use real, natural, and recycled materials within your play environment?

Which of the following materials can often be recycled?*

What material is made by heating a mixture of sand, limestone and sodium carbonate? Soda-lime glassConcreteClay ceramicsBorosilicate glass2Which of the following statements about composites is not true? They are usually made of two materials, with one material acting as a binder for the otherThey make a product with improved properties that neither material could provide aloneFibreglass is a composite of glass and metalConcrete is a composite of cement, sand and gravel mixed with water3What reaction conditions are needed to form low density poly(ethene)? Low pressure, presence of oxygenCatalyst at 50°C, slightly raised pressureHigh pressure, presence of oxygenHigh pressure, catalyst4Which type of polymer melts easily and can therefore be remoulded? CompositeThermosofteningThermosettingThermomelting

What are outside raw materials used for by an organism?

• On the Basis of Raw Materials:→ Agro based industries: Use plant and animal based products as their raw materials. Examples: Food processing, vegetable oil, cotton textile, dairy products and leather industries.→ Mineral based industries: Use mineral ores as their raw materials. The products of these industries feed other industries. Example: Iron made from iron ore.→ Marine based industries: Use products from the sea and oceans as raw materials. Examples: Industries processing sea food or manufacturing fish oil.→ Forest based industries: Use forest produce as raw materials. Examples: pulp and paper, pharmaceuticals, furniture and buildings.