Physical and Chemical 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 altering its chemical composition. Examples include changes in state, shape, or size.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a change in the chemical makeup of a substance.

Front

What happens to temperature when a gas changes to a liquid?

Back

The temperature decreases.

Front

What is the main difference between physical and chemical changes?

Back

Chemical changes always change a substance’s chemical makeup, whereas physical changes do not affect its chemical makeup.

Front

Is boiling water a physical or chemical change?

Back

Boiling water is a physical change because it involves a change in state from liquid to gas without changing the chemical composition.

Front

What is an example of a chemical change?

Back

Mixing vinegar with baking soda, which produces fizzing and gas bubbles as a new substance is formed.

Front

What is an example of a physical change?

Back

Shredding a piece of paper is a physical change because it changes the shape but not the chemical composition.

Front

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

Back

The mass of a substance remains the same during a physical change.

Front

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

Back

The mass of a substance can change during a chemical change, as new substances are formed.

Front

What is an example of a physical change involving a change in shape?

Back

Folding a piece of paper into a paper airplane is an example of a physical change.