materials

A material is a substance or mixture of substances that constitutes an object. Materials can be pure or impure, living or non-living matter. Materials can be classified on the basis of their physical and chemical properties, or on their geological origin or biological function. Materials science is the study of materials, their properties, and their applications.
Raw materials can be processed in different ways to influence their properties, by purification, shaping or the introduction of other materials. New materials can be produced from raw materials by synthesis.
In industry, materials are inputs to manufacturing processes to produce productS or more complex materials, and the nature and quantity of materials used may form part of the calculation for the cost of a product or delivery under contract, Such as where contract costS are calculated on a "time and materials" basis.

View More On Wikipedia.org