Physical vs. Chemical Changes

Front

What is a chemical change?

Back

A change in which new substances are formed.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

Give an example of a chemical change.

Back

Burning wood.

Front

Give an example of a physical change.

Back

Melting butter.

Front

What happens to the substances in a chemical change?

Back

They undergo a transformation to form new substances.

Front

What happens to the substances in a physical change?

Back

They change form or appearance but remain the same substance.

Front

Is breaking a pencil a chemical or physical change?

Back

Physical change.

Front

Is rusting of iron a chemical or physical change?

Back

Chemical change.

Front

Is souring of milk a chemical or physical change?

Back

Chemical change.

Front

What is an example of a reversible physical change?

Back

Freezing and melting of water.