Physical & Chemical Properties & Changes

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What is a chemical property?

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A characteristic of a substance that can only be observed during a chemical reaction, indicating how a substance interacts with other substances.

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What is a physical property?

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A characteristic of a substance that can be observed or measured without changing the substance's chemical identity, such as color, density, and boiling point.

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What is flammability?

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A chemical property that describes how easily a substance can ignite and burn.

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What is a physical change?

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A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or freezing.

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What is a chemical change?

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A change that results in the formation of new chemical substances, indicating that a chemical reaction has occurred.

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What does 'supports combustion' mean?

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A chemical property indicating that a substance can help sustain a fire or burning process.

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What is an example of a physical change?

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Cutting a loaf of bread into slices.

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What is an example of a chemical change?

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Rust forming on a metal surface when it reacts with oxygen and moisture.

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What happens during digestion of food?

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Physical changes occur when food is chewed, followed by chemical changes as enzymes break down the food into simpler substances.

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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 alter the chemical composition of a substance, while a chemical change results in new substances being formed.