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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, involving a rearrangement of atoms.

Front

Give an example of a physical change.

Back

Ripping up paper is an example of a physical change.

Front

Give an example of a chemical change that occurs in the body.

Back

Food being broken down by enzymes in your stomach is a chemical change.

Front

What happens to water when it freezes?

Back

Water freezing into ice is an example of a physical change.

Front

Can physical changes be easily reversed?

Back

Yes, physical changes can often be easily reversed.

Front

What happens when sodium reacts with chlorine?

Back

A new compound is formed — salt.

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change results in new substances being formed.

Front

Is rusting of iron a physical or chemical change?

Back

Rusting of iron is a chemical change.

Front

What is an example of a reversible physical change?

Back

Melting ice is an example of a reversible physical change.