physical and chemical properties

Front

What is a physical change?

Back

A physical change is a change that does not alter the chemical composition of a substance. 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 the substance during a physical change?

Back

The substance remains the same at the molecular level; only its physical properties change.

Front

What happens to the substance during a chemical change?

Back

The substance undergoes a transformation that changes its molecular structure, resulting in new substances.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

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What is an example of a chemical change?

Back

An example of a chemical change is an egg cooking.

Front

What indicates a chemical change has occurred?

Back

Signs of a chemical change include color change, gas production (bubbles), temperature change, and the formation of a precipitate.

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Is milk souring a physical or chemical change?

Back

Milk souring is a chemical change.

Front

Is food digesting a physical or chemical change?

Back

Food digesting is a chemical change.

Front

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

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A physical property can be observed without changing the substance's identity, while a chemical property can only be observed during a chemical reaction.