Chemical vs Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

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 sign that a chemical reaction has occurred?

Back

Formation of a gas, change in color, temperature change, or the production of light.

Front

Is burning wood a chemical or physical change?

Back

Burning wood is a chemical change because it transforms the wood into ash and gases.

Front

What happens to a copper penny over time?

Back

A copper penny can turn green due to a chemical change called oxidation.

Front

What is an example of a physical change?

Back

Cutting a piece of paper is an example of a physical change.

Front

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

Back

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

Front

What is an example of a chemical change?

Back

Rust forming on iron is an example of a chemical change.

Front

What happens during a chemical reaction?

Back

Atoms rearrange to form new substances with different properties.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as freezing and melting water.