Physical vs Chemical 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 melting, freezing, and dissolving.

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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 includes processes like combustion, rusting, and digestion.

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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, melting point, and density.

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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 change.

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Getting a haircut is an example of a physical change because it alters the appearance of hair without changing its chemical structure.

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Give an example of a chemical change.

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An explosion is an example of a chemical change because it involves a chemical reaction that produces new substances.

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What happens to a substance during a physical change?

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

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What happens to a substance during a chemical change?

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During a chemical change, the substance undergoes a transformation that results in the formation of one or more new substances with different properties.

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What is magnetism?

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Magnetism is a physical property that describes the ability of a substance to attract or repel other materials, particularly metals.

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What is reactivity with oxygen?

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Reactivity with oxygen is a chemical property that describes how a substance interacts with oxygen, often resulting in oxidation or combustion.