🏆#5 Phy/Chem Changes Flashcardizz Review

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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 cannot be reversed by simple physical means. Examples include burning, rusting, and cooking.

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What is an example of a physical change?

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Melting of ice, dissolving sugar in water, and breaking a glass are examples of physical changes.

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What is an example of a chemical change?

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Burning wood, baking a cake, and rusting of iron are examples of chemical changes.

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What are some indicators of a chemical reaction?

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Indicators of a chemical reaction include color change, gas production, temperature change, and formation of a precipitate.

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What does it mean if a substance cannot return to its original form?

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If a substance cannot return to its original form, it indicates that a chemical change has occurred.

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What factors can increase the rate of a chemical reaction?

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Factors that can increase the rate of a chemical reaction include increasing temperature, increasing concentration of reactants, and increasing surface area.

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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 happens to the properties of a substance during a physical change?

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The properties of a substance may change (like shape or state), but its chemical identity remains the same.

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What is a precipitate?

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A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.