Physical vs chemical Change quick check

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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. Examples include changes in state (like melting or freezing), shape, or size.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and the breaking and forming of bonds. Examples include burning, rusting, and digestion.

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What is an example of a physical change?

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Evaporating water is an example of a physical change, as it changes from liquid to gas without changing its chemical composition.

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Is burning wood a chemical or physical change?

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Burning wood is a chemical change because it involves a reaction with oxygen that produces new substances, such as ash and gases.

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What happens to the chemical composition of a substance during a physical change?

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

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What happens to the chemical composition of a substance during a chemical change?

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The chemical composition of a substance changes during a chemical change, resulting in the formation of new substances.

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Give an example of a process that is a chemical change.

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Rusting of iron is an example of a chemical change, as it involves a reaction with oxygen to form iron oxide.

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

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A physical change affects the form or appearance of a substance without changing its chemical identity, while a chemical change results in the formation of new substances with different chemical properties.

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Is mowing the lawn a physical or chemical change?

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Mowing the lawn is a physical change because it alters the appearance of the grass without changing its chemical composition.

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What are some indicators of a chemical change?

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Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.