write 15 points on physical and chemical changes
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Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Many physical changes are reversible, if sufficient energy is supplied. The only way to reverse a chemical change is via another chemical reaction
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in physical changes appearance or frim of the matter in the substance does not. however in a chemical change ,the kind of matter change and at least one new substance with new properties is formed. the distinction is a between physical and chemical change is not clise cut.
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