Chemical and Physical Changes

Front

What is a chemical change?

Back

A process where one or more substances are transformed into new substances with different properties.

Front

What is a physical change?

Back

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

Front

What is an example of a chemical change?

Back

Gasoline burns in a car engine.

Front

What is an example of a physical change?

Back

Water freezes to form ice.

Front

What are signs of a chemical reaction?

Back

Color change, gas formation, light production, and temperature change.

Front

What is NOT a sign of a chemical reaction?

Back

Cutting a substance into smaller pieces.

Front

What happens during a chemical change?

Back

New substances are formed with different properties.

Front

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

Back

Chemical changes result in new substances; physical changes do not.

Front

What is gas formation in a reaction?

Back

The production of gas as a result of a chemical reaction, indicating a chemical change.

Front

What is an example of a physical property?

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Color, shape, size, and state of matter.