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, hardness, and melting 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 hardness?

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A physical property that measures a material's resistance to deformation or scratching.

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What is a chemical change?

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A process that involves the transformation of one or more substances into different substances, often accompanied by energy changes.

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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.

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Example of a chemical change: Rust formation on metal.

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Rusting is a chemical change where iron reacts with oxygen and moisture to form iron oxide.

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Example of a physical change: Melting ice.

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Melting is a physical change where solid ice turns into liquid water without changing its chemical structure.

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What happens during combustion?

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Combustion is a chemical change that occurs when a substance reacts rapidly with oxygen, producing heat and light.

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What is the significance of color change in a chemical reaction?

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A color change often indicates a chemical change has occurred, suggesting new substances have formed.