chemical vs physical change

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What is a chemical change?

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A process where substances combine or break apart to form new substances with different 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.

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What is a sign of a chemical reaction?

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Formation of a gas, change in color, temperature change, or formation of a precipitate.

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Is melting ice a physical or chemical change?

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Physical change.

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What is reactivity in terms of chemical properties?

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Reactivity is the ability of a substance to undergo a chemical reaction with another substance.

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What happens during oxidation?

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Oxidation is a chemical reaction where a substance reacts with oxygen, often resulting in rust.

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What are physical properties?

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Characteristics of a substance that can be observed or measured without changing its identity, such as color, density, and melting point.

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What is an example of a chemical change?

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Burning wood, which produces ash and smoke.

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What is an example of a physical change?

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Dissolving sugar in water, where the sugar can be recovered.

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What is the difference between a chemical property and a physical property?

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Chemical properties describe a substance's ability to undergo changes that transform it into different substances, while physical properties can be observed without changing the substance.