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MATERIALS, image, image, image, image, image, image, image, image, image,…

- - - - A physical process is when a substance changes its state,
        for example when a metal melts. The chemical composition
        of the material does not change.
    - - A chemical process is when a substance is transformed
        into a different substance with different characteristics. The
        composition of the material changes. For example, petrol
        derivatives are transformed to create some types of plastic.
- - - - wool, cotton and wood
    - - coal, oil and minerals*