Physical or Chemical Change?

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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 freezing, melting, 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 the rearrangement of atoms. Examples include rusting, burning, and mixing baking soda with vinegar.

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What happens to the substance during a physical change?

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During a physical change, the substance retains its chemical identity. The changes are usually reversible, such as ice melting into water.

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What happens to the substance during a chemical change?

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During a chemical change, the original substance is transformed into one or more new substances with different properties. This change is often irreversible.

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Is freezing juice a physical or chemical change?

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Freezing juice is a physical change because it changes the state of the juice from liquid to solid without altering its chemical composition.

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What indicates a chemical change has occurred?

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Indicators of a chemical change include the production of gas, a change in color, the formation of a precipitate, or a change in temperature.

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Is mixing baking soda and vinegar a physical or chemical change?

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Mixing baking soda and vinegar is a chemical change because it produces carbon dioxide gas and new substances.

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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 (rust).

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Is burning coal a physical or chemical change?

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Burning coal is a chemical change because it involves a reaction with oxygen that produces new substances, including carbon dioxide and ash.

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What is an example of a reversible physical change?

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An example of a reversible physical change is melting ice into water and then freezing it back into ice.