Insert the right words. a)develop b) cement c) electricity d) thermoplastics e) are used f)processes j) various natural substances 1.a variety of materials in different products. 2.extracted materials, such as plastics, alloys and ceramics, are created through the processing 3.biological materials are substances as part of a plant or animal. 4.extracted materials are created through that expend a great deal of energy or alter the microstructure of the substances used to make the ma terials.

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