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 dissolving.

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 changes the composition of the original substance.

Front

Is cooking an egg a physical or chemical change?

Back

Chemical change.

Front

What is an example of a physical change?

Back

A soda can being smashed.

Front

If you mix sodas, is it a physical or chemical change?

Back

Physical change.

Front

What happens during a chemical change?

Back

During a chemical change, the atoms in the reactants rearrange to form new substances with different properties.

Front

Can you always see a chemical change?

Back

No, some chemical changes are not visible.

Front

What is an example of a chemical change?

Back

Rusting of iron.

Front

What is boiling water an example of?

Back

Boiling water is an example of a physical change.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not change the substance's chemical identity, while chemical changes do.