Physical & Chemical Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, and it cannot be undone.

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

Give an example of a chemical change.

Back

Fireworks exploding is an example of a chemical change.

Front

Give an example of a physical change.

Back

Crushing a can is an example of a physical change.

Front

What happens to the substances in a chemical change?

Back

In a chemical change, the original substances are transformed into different substances with new properties.

Front

Can a chemical change be reversed?

Back

No, a chemical change cannot be easily reversed.

Front

What is rusting an example of?

Back

Rusting is an example of a chemical change.

Front

Is cutting lemons a chemical change?

Back

No, cutting lemons is a physical change.

Front

What are some signs of a chemical change?

Back

Signs of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.

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 the formation of new substances.