P.2.3 EOG Review #5

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What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different 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.

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What is an example of a chemical change?

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Rusting of a nail is an example of a chemical change, as it forms a new substance (iron oxide).

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What is an example of a physical change?

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Deflating a basketball is an example of a physical change, as it changes the shape but not the substance of the ball.

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What happens to water when it boils?

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When water boils, it undergoes a physical change from liquid to gas (water vapor), but the chemical composition remains the same.

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

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A physical property can be observed without changing the substance (like color or shape), while a chemical property describes how a substance reacts to form new substances.

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What is an effervescent tablet?

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An effervescent tablet is a type of medication that releases gas when dissolved in water, indicating a chemical change.

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What does it mean when gas bubbles form in a solution?

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The formation of gas bubbles in a solution, such as when an effervescent tablet dissolves, is a sign of a chemical change.

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What is an example of a new substance being formed?

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A nail rusting is an example of a new substance being formed, as it creates iron oxide.

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What occurs when sugar dissolves in water?

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When sugar dissolves in water, it is a physical change because the sugar can be recovered without a chemical reaction.