Physical and Chemical Changes

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Presentation transcript:

Physical and Chemical Changes I can identify physical and chemical changes and examine the effects on matter.

Changes to matter… Physical Changes Chemical Changes Do NOT change the chemical make up of the substance Easily reversed because no change to the chemistry of the substance has been made Chemical Changes Change the chemical identity of the substance Cannot be reversed because you have an entirely new substance

Physical changes Mixtures can be separated by physical means Evaporation Chromatography By hand Centrifuge Magnetism

Physical Changes Shape or size Dissolving State of matter Mixing

Dissolving The particles aren’t chemical joined, it’s like a party in the glass.

Chemical Changes Make an entirely new substance with different properties 5 signs of a chemical change: Fizzing/foaming Light/heat given off Color change Smell change Sound given off

Chemical Changes Energy is either absorbed or given off Exothermic- Energy given off Endothermic- Energy absorbed