Physical and Chemical 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

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

Define precipitate in the context of chemical changes.

Back

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

Front

What happens when vinegar is mixed with baking soda?

Back

A chemical change occurs, producing carbon dioxide gas and a precipitate.

Front

What is rust?

Back

A chemical compound formed when iron reacts with oxygen and moisture over time.

Front

Give an example of a physical change.

Back

Melting ice into water.

Front

Give an example of a chemical change.

Back

Burning wood to produce ash and smoke.

Front

What evidence indicates a chemical change has occurred?

Back

Color change, gas production, formation of a precipitate, or temperature change.

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 example of a precipitate?

Back

The white solid formed when milk and vinegar are mixed.