NC Check In: Physical Science 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 boiling water, melting ice, and shredding paper.

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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. Examples include rusting iron, burning coal, and baking a cake.

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What is the Law of Conservation of Mass?

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The Law of Conservation of Mass states that in a closed system, the total mass of reactants must equal the total mass of products in a chemical reaction.

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What happens to mass during a chemical reaction?

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The total mass remains the same; however, gases may be released, which can make it seem like mass is lost.

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What is an example of a physical change?

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Freezing water is an example of a physical change.

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What is an example of a chemical change?

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Burning coal is an example of a chemical change.

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How are periods organized on the periodic table?

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Periods on the periodic table are organized by increasing atomic number from left to right.

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What is a limitation of wind turbines?

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Wind turbines are efficient only in certain areas, which can limit their effectiveness in energy production.

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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 new substances being formed.

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Front

What is an example of a gas being released in a chemical reaction?

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An example is the release of carbon dioxide when vinegar reacts with baking soda.

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