Chemical and Physical Properties

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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 hammering wood, melting ice, or dissolving sugar in water.

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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. Examples include burning wood, rusting iron, or cooking an egg.

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What is an example of a physical property?

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State of matter (solid, liquid, gas) is an example of a physical property.

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What is rusting?

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Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the air, forming iron oxide.

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What happens to a copper penny over time?

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A copper penny can undergo a chemical change, turning greenish due to the formation of copper carbonate when it reacts with carbon dioxide and moisture.

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Is crumpling paper a physical or chemical change?

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Crumpling paper is a physical change because it alters the shape of the paper without changing its chemical composition.

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What is flammability?

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Flammability is a chemical property that describes how easily a substance can catch fire and burn.

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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 the formation of new substances.

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What is an example of a chemical change?

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Burning a marshmallow is an example of a chemical change because it produces new substances (ash, gases) and changes the original material.

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What is the definition of a physical property?

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A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity.