Chemical and Physical Changes

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What is a chemical change?

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A chemical change occurs when two or more substances react to form one or more new substances.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is an example of a chemical change?

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An example of a chemical change is the reaction between vinegar and baking soda, which produces carbon dioxide gas.

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What is an example of a physical change?

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An example of a physical change is melting ice into water.

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What is a precipitate?

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A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

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What happens to the chemical composition during a chemical change?

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The chemical composition of the substances involved changes, resulting in the formation of new substances.

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What happens to the chemical composition during a physical change?

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The chemical composition of the substance remains the same during a physical change.

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What is the difference between a chemical change and a physical change?

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A chemical change results in the formation of new substances with different properties, while a physical change does not alter the chemical composition of the substance.

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What is an example of a chemical change involving heat?

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An example of a chemical change involving heat is the combustion of wood, which produces ash, smoke, and gases.

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What is an example of a physical change involving shape?

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An example of a physical change involving shape is bending a metal wire.