Physical and Chemical Changes

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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 a chemical change?

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A chemical change is a change that results in the formation of new chemical substances, involving a rearrangement of atoms.

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Give an example of a physical change.

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Melting ice is an example of a physical change.

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Give an example of a chemical change.

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Cooking an egg is an example of a chemical change.

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What happens to iron when it rusts?

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When iron rusts, it undergoes a chemical change due to a reaction with oxygen and moisture, forming 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 does not change the substance's chemical identity, while a chemical change results in the formation of new substances.

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What is an indicator 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.

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What is an example of a process that is both a physical and chemical change?

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Burning wood is a chemical change, but the ash produced can be considered a physical change.

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What is boiling water an example of?

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

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What is the role of heat in chemical changes?

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Heat can provide the energy needed to break bonds in reactants, facilitating a chemical change.

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