5.P.2.3 Chemical and Physical Changes

Front

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 dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and cooking.

Front

What happens to water when heat is added?

Back

When heat is added to water, it can change from a liquid to a gas (steam) or from a solid (ice) to a liquid (water). This is a physical change.

Front

What happens to an apple when it turns brown?

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When an apple turns brown, it undergoes a chemical change due to oxidation, which alters its chemical composition.

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What is an example of a physical change?

Back

Making a paper airplane is an example of a physical change because it changes the shape of the paper but not its chemical structure.

Front

What is an example of a chemical change?

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Frying an egg is an example of a chemical change because it changes the egg's chemical structure.

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What occurs during the burning of wood?

Back

During the burning of wood, a chemical change occurs as the wood reacts with oxygen, releasing gases and producing ash.

Front

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 the formation of new substances.

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What is an example of a physical change involving water?

Back

Boiling water is an example of a physical change, as it changes from liquid to gas without changing its chemical composition.

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What is an example of a chemical change involving food?

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Baking a pie is an example of a chemical change, as the ingredients undergo chemical reactions to form new substances.