Chemical and Physical Changes

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Physical and Chemical Changes

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Presentation transcript:

Chemical and Physical Changes

Physical Changes Changes that do not affect the nature or the characteristic properties of a substance Ex. Breaking glass, phase changes

Phase Changes

Energy in Phase Changes

Chemical Changes Changes that transform the nature and characteristic properties of a substance Ex. Burning wood, cooking food, combustion of gas

Signs of a chemical change Change of colour Greater changes of heat Generation of Light Release of a Gas Formation of a Precipitate (a solid material forms in a liquid)