Changes/Properties in Matter

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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 state (like melting or freezing), shape, or size.

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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 rusting, burning, and cooking.

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What is the melting point?

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The melting point is the temperature at which a solid becomes a liquid. It is a physical property of a substance.

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What is 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, density, and melting point.

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What is a chemical property?

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A chemical property is a characteristic of a substance that becomes evident during a chemical reaction. It describes the substance's ability to undergo changes that transform it into different substances.

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Give an example of a physical property.

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An example of a physical property is taste.

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Give an example of a chemical property.

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An example of a chemical property is the ability of a substance to react with water.

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What happens during a physical change?

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During a physical change, the form of a substance may change, but its chemical composition remains the same.

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What happens during a chemical change?

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During a chemical change, the original substances are transformed into one or more new substances with different properties.

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Is cutting a piece of paper in half a physical or chemical change?

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Cutting a piece of paper in half is a physical change.