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What is a Chemical Change?

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A process where substances combine or break apart to form new substances, often accompanied by energy changes.

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What is a Physical Change?

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A change that affects one or more physical properties of a substance without altering its chemical composition.

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What happens to the mass of reactants and products in a chemical reaction?

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The mass of the reactants before the reaction is equal to the mass of the products after the reaction.

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What is an example of a Chemical Change?

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Baking soda reacting with vinegar to produce carbon dioxide.

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What is an example of a Physical Change?

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Melting ice into water.

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What is an Independent Variable in an experiment?

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The one factor that is changed on purpose to test its effect.

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What is a Dependent Variable in an experiment?

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The factor that is measured or observed in response to changes in the independent variable.

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What is a Control in an experiment?

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The standard to which the outcome of a test is compared; it remains constant.

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What is an example of a Chemical Change involving a candle?

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A candle burning, where wax is transformed into carbon dioxide and water.

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What is oxidation?

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A chemical reaction where a substance loses electrons, often resulting in a change in color, like a copper penny turning green.