Unit 4 Practice Flashcard- Properties of Matter

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. Example: Water freezing to ice.

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What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Example: A reaction that produces gas and increases temperature.

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What is a characteristic of a chemical change?

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A characteristic of a chemical change is a change in color.

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What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that appears to be evenly mixed throughout, with a uniform composition. Example: Saltwater.

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What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not evenly distributed and can be easily distinguished. Example: Salad.

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What is the condensation point?

Back

The condensation point is the temperature at which a gas becomes a liquid.

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What happens during a physical change?

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During a physical change, the substance may change its state (solid, liquid, gas) or appearance, but its chemical identity 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 melting ice.

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What is an example of a chemical change?

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An example of a chemical change is rust forming on iron.

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

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A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.