Identify Chemical and Physical 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 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 digestion.

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Can a physical change result in a color change?

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Yes, a physical change can result in a color change. For example, when a red candy dissolves in water, the water turns pink, but the chemical composition of the candy remains unchanged.

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What is an example of a physical change?

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An example of a physical change is honey dissolving in tea. The honey retains its chemical properties even after dissolving.

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What happens when two clear, colorless solutions are combined and a white substance forms?

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This indicates a chemical reaction has occurred, resulting in the formation of a new substance that is no longer dissolved in the solution.

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What is cutting paper an example of?

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Cutting paper is an example of a physical change because it alters the shape and size of the paper without changing its chemical composition.

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What is a chemical property?

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A chemical property is a characteristic of a substance that can only be observed during a chemical reaction. Examples include reactivity with acids, flammability, and oxidation states.

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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 its chemical identity. Examples include color, melting point, and density.

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What occurs during a chemical reaction?

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During a chemical reaction, the bonds between atoms in reactants are broken and new bonds are formed to create products, resulting in a change in chemical composition.

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What is an example of a chemical change?

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An example of a chemical change is the reaction between baking soda and vinegar, which produces carbon dioxide gas and results in a fizzing reaction.