Physical and Chemical Changes Review

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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and baking.

Front

What happens to the colors of a flag when it is damaged by the sun?

Back

The colors of the flag become dull and faded due to prolonged exposure to sunlight.

Front

Give an example of a physical change.

Back

Making a paper airplane is an example of a physical change.

Front

What happens to wood when it burns in a bonfire?

Back

The wood releases a gas as smoke, indicating a chemical change.

Front

What occurs to the inside of an egg when it is boiled?

Back

The liquid inside the egg becomes solid when boiled.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change because it changes from solid to liquid without altering its chemical structure.

Front

What is an example of a chemical change in cooking?

Back

Baking cake batter to make a cake is an example of a chemical change.

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 new substances being formed.

Front

What happens to a substance during a physical change?

Back

The substance may change its form or appearance, but its chemical composition remains the same.