Physical and Chemical Properties

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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. Examples include melting, freezing, and dissolving.

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What is a Chemical Change?

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

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Is separating sand from gravel a physical or chemical change?

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Physical Change.

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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. Examples include color, density, and melting point.

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Is blue color a chemical or physical property?

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Physical Property.

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What is a Chemical Property?

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A characteristic of a substance that becomes evident during a chemical reaction; it describes the substance's potential to undergo some chemical change or reaction. Examples include reactivity with acid and flammability.

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Is a rusting bicycle a physical or chemical change?

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Chemical Change.

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What is Density?

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Density is the mass per unit volume of a substance, typically expressed in grams per cubic centimeter (g/cm³). It is a physical property.

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Is density a chemical or physical property?

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Physical Property.

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What happens during a Physical Change?

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The form of a substance changes, but its chemical composition remains the same.