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 splitting.

Front

What is a chemical change?

Back

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

Front

Is melting ice cream a chemical or physical change?

Back

Melting ice cream is a physical change.

Front

Is nail rusting a chemical or physical change?

Back

Nail rusting is a chemical change.

Front

What happens to the substance during a physical change?

Back

During a physical change, the substance remains the same at the molecular level; only its form or appearance changes.

Front

What happens to the substance during a chemical change?

Back

During a chemical change, the substance transforms into one or more different substances with new chemical properties.

Front

Give an example of a physical change.

Back

An example of a physical change is splitting a chocolate bar.

Front

Give an example of a chemical change.

Back

An example of a chemical change is burning wood.

Front

What is an example of a physical change that does not change the substance?

Back

Making a paper airplane is an example of a physical change that does not change the substance.

Front

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

Back

A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.