Physical vs Chemical 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 changes in state (like melting or freezing) and changes in shape or size.

Front

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 the rearrangement of atoms. Examples include burning, rusting, and baking.

Front

Give an example of a physical change.

Back

Evaporating water is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

What happens to the substances in a physical change?

Back

In a physical change, the substances retain their original properties and composition.

Front

What happens to the substances in a chemical change?

Back

In a chemical change, new substances are formed with different properties and compositions.

Front

Is breaking a pencil a physical or chemical change?

Back

Breaking a pencil is a physical change.

Front

What is rusting an example of?

Back

Rusting is an example of a chemical change.

Front

What is the significance of color change in a chemical reaction?

Back

A color change can indicate that a chemical change has occurred, often suggesting that new substances have formed.

Front

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

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.