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The changes matter undergoes are classified as either physical changes or chemical changes. A process in which a substance changes its physical form or appearance but not its basic composition is called a physical change. Can you name some physical changes?
Chemical changes are always changes in the composition and form of a substance. In a chemical change, matter is transformed completely into different materials and new substances are formed. The type of chemical changes that a substance can undergo are determined by its chemical properties. Can you name some chemical changes?
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