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 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. It involves a chemical reaction and the rearrangement of atoms. Examples include rusting, burning, and baking.

Front

Is dissolving Gatorade powder in water a physical or chemical change?

Back

Physical change.

Front

What happens when baking soda and vinegar are combined?

Back

They undergo a chemical change, producing carbon dioxide gas.

Front

What is an example of a new substance forming?

Back

Lighting a match is an example of a new substance forming.

Front

What type of change occurs when a chocolate bar melts?

Back

Physical change.

Front

What is the best way to identify a chemical change?

Back

Look for signs such as color change, gas production, temperature change, or the formation of a precipitate.

Front

What is an example of a physical change?

Back

Cutting a piece of paper is an example of a physical change.

Front

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

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.