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Physical and Chemical Changes

Physical and Chemical Changes. Draw a T chart in your notes and label one side Physical Change and the other side Chemical Change. Concept of Change. Change: the act of altering a substance. Physical Change.

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Physical and Chemical Changes

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  1. Physical and Chemical Changes Draw a T chart in your notes and label one side Physical Change and the other side Chemical Change

  2. Concept of Change • Change: the act of altering a substance

  3. Physical Change • Physical change: a change that occurs that does not change the identity of the substance • Melting ice • Freezing Kool-aid • Tearing paper • Boiling water

  4. Evidence of Physical Changes • Dissolved • Change in shape • Change of states • solid to liquid • Liquid to gas

  5. Chemical Changes • Chemical change: a change that occurs causing the identity of the substance to change • Burning • Reacting with other substances • A chemical change is called a chemical

  6. Chemical Changes Cont’d • Evidence of a chemical change: • Formation of gas • Change in temperature • Color change • Formation of a precipitate

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