Physical vs. Chemical Change

Front

What is a physical change?

Back

A change affecting the form of a chemical substance, but not its chemical composition.

Front

What is a chemical change?

Back

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

Front

Give an example of a physical change.

Back

Melting ice into water.

Front

Give an example of a chemical change.

Back

Burning wood.

Front

What happens to mass during physical and chemical changes?

Back

Mass is not created or destroyed but is transformed into different substances.

Front

What is the law of conservation of mass?

Back

In chemical and physical changes, mass is conserved; it is neither created nor destroyed.

Front

What is an example of a reversible physical change?

Back

Freezing and melting of water.

Front

What is an example of an irreversible chemical change?

Back

Rusting of iron.

Front

What property of chocolate remains the same when it is melted?

Back

Mass.

Front

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

Back

Physical changes do not alter the chemical composition, while chemical changes do.