physical and chemical changes 501

Front

What is a physical change?

Back

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

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

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 metal rusting is an example of a chemical change.

Front

What happens to the substances in a physical change?

Back

The substances retain their original properties and composition.

Front

What happens to the substances in a chemical change?

Back

The substances change into new substances with different properties.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change.

Front

What is one characteristic of a chemical change?

Back

A chemical change always creates a new substance.

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as freezing and melting.