PHYSICAL AND 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 melting, freezing, and boiling.

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 includes changes such as rusting, burning, and digestion.

Front

Give an example of a physical change.

Back

Butter melting is an example of a physical change.

Front

Give an example of a chemical change.

Back

A candle burning is an example of a chemical change.

Front

What evidence indicates a chemical change has occurred?

Back

Evidence of a chemical change includes unexpected color change, temperature change, gas production, and the formation of a new substance.

Front

What happens to the properties of a substance during a physical change?

Back

The properties of a substance may change in form or appearance, but the chemical composition remains the same.

Front

What happens to the properties of a substance during a chemical change?

Back

The properties of a substance change completely, resulting in the formation of one or more new substances with different chemical compositions.

Front

Is boiling water a physical or chemical change?

Back

Boiling water is a physical change because it changes from liquid to gas without altering its chemical composition.

Front

What is an example of a chemical reaction?

Back

Mixing baking soda and vinegar to produce gas bubbles is an example of a chemical reaction.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the air, forming iron oxide.