Natural Material - any product that exists that comes from a plant, animal, or the Earth, Synthetic Material - any product that exists that is artificial or man-made., Mixed Materials - any product that exists that uses both natural and synthetic materials., Metals - elements, compounds, or alloys that account for roughly two-thirds of all materials., Ceramics - materials formed from powdered materials through the application of heat, Polymers - plastics or rubber, thermoplastics-melted and then molded or extruded-thermoset plastics- cannot be molded, Composites - any combination(s) of two or more distinct materials, in which those materials maintain their original properties., Flow Diagram - depicts how energy moves through a system, Sankey Diagram - shows the type of energy that goes into a system and how the energy is converted,

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