Chemical and 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 altering its chemical composition. Examples include changes in state (like melting or freezing) and changes in 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 chemical reaction and the rearrangement of atoms. Examples include rusting, burning, and digestion.

Front

What happens to the chemical composition during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in new substances.

Front

Give an example of a physical change.

Back

An ice cube melting is an example of a physical change.

Front

Give an example of a chemical change.

Back

Iron rusting is an example of a chemical change.

Front

What is a sign of a chemical change?

Back

Signs of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.

Front

What is an example of a process that indicates a chemical change?

Back

A rotting potato giving off a bad smell is an example of a process that indicates a chemical change.

Front

Is breaking a glass bottle a chemical or physical change?

Back

Breaking a glass bottle is a physical change.

Front

What is the result of hydrochloric acid reacting with potassium hydroxide?

Back

The reaction produces a salt, water, and heat, indicating a chemical change.