Chemical vs Physical Changes

Front

What is a chemical change?

Back

A process where one or more new substances are formed, often accompanied by energy changes.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Is digesting food a physical or chemical change?

Back

Chemical change.

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas.

Front

What happens to the mass of a substance during a physical change?

Back

The mass remains the same.

Front

Give an example of a physical change.

Back

A chainsaw cutting down a tree.

Front

What is an example of a chemical change?

Back

Burning wood in a campfire.

Front

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

Back

Physical changes do not create new substances, while chemical changes do.

Front

What is an indicator of a chemical change?

Back

Change in color, temperature, formation of gas, or precipitate.

Front

What happens to the shape of a substance during a physical change?

Back

The shape can change, but the substance remains the same.