Physical and Chemical Properties and 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. Examples include changes in shape, size, or state of matter.

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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 rearrangement of atoms. Examples include burning, rusting, and baking.

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What is a clue that a chemical change has occurred?

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A new substance formed is a key clue that a chemical change has occurred.

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What happens to the properties of a substance during a physical change?

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The properties of a substance may change, but its chemical composition remains the same.

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

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The properties of a substance change, and a new substance is formed with different chemical properties.

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Is cutting your hair a physical or chemical change?

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Cutting your hair is an example of a physical change.

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What is an example of a chemical change?

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Baking a cake is an example of a chemical change.

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What is an example of a physical change?

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Folding paper to make an origami bookmark is an example of a physical change.

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What is the definition of a physical property?

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A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, mass, and volume.

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What is the definition of a chemical property?

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A chemical property is a characteristic of a substance that becomes evident during a chemical reaction. Examples include reactivity with acids, flammability, and oxidation states.