Physical or Chemical Change

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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 melting, freezing, and evaporating.

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What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, cooking, and rusting.

Front

Is melting ice a physical or chemical change?

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Melting ice is a physical change.

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Is burning wood a physical or chemical change?

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Burning wood is a chemical change.

Front

What happens to the molecules during a physical change?

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During a physical change, the molecules may change their arrangement or state (solid, liquid, gas) but their chemical structure remains the same.

Front

What happens to the molecules during a chemical change?

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During a chemical change, the molecules rearrange to form new substances with different chemical properties.

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Is dissolving sugar in water a physical or chemical change?

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Dissolving sugar in water is a physical change.

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Is cooking an egg a physical or chemical change?

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Cooking an egg is a chemical change.

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What is an example of a physical change?

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An example of a physical change is the evaporation of water.

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What is an example of a chemical change?

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An example of a chemical change is the rusting of iron.