Physical or Chemical Change SC.5.P.9.1

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What is a physical change?

Back

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 breaking.

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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. It involves a chemical reaction and changes the chemical properties of the original substance. Examples include baking a cake and rusting iron.

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What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Each substance retains its own properties. Examples include salad, air, and lucky charms.

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What is an example of a mixture?

Back

Fruit salad is an example of a mixture because it combines different fruits without changing their individual properties.

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What is NOT an example of a mixture?

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Salt is NOT an example of a mixture; it is a pure substance.

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What happens during a physical change?

Back

During a physical change, the form of a substance changes, but its chemical identity remains the same.

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What happens during a chemical change?

Back

During a chemical change, the substances involved undergo a chemical reaction, resulting in new substances with different properties.

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Is mowing the lawn a physical or chemical change?

Back

Mowing the lawn is an example of a physical change.

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Is popping popcorn a physical or chemical change?

Back

Popping popcorn is an example of a chemical change because it results in a new substance with different properties.

Front

What is an example of a physical change?

Back

Glass breaking is an example of a physical change.