Chemical vs. Physical 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 changing its chemical composition.

Front

What is a chemical change?

Back

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

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

What happens to the substance in a physical change?

Back

The substance may change form or state, but its chemical identity remains the same.

Front

What happens to the substance in a chemical change?

Back

The substance changes into one or more different substances with new chemical properties.

Front

What is the flame test used for?

Back

The flame test is used to identify the presence of certain gases, like hydrogen.

Front

What is an indicator of a chemical change?

Back

An indicator of a chemical change can be a change in color, temperature, or the production of gas.

Front

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

Back

A physical change does not create new substances, while a chemical change does.

Front

What is an example of a reversible physical change?

Back

Freezing and melting water is an example of a reversible physical change.