Physical and Chemical Changes

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances, 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

Give an example of a chemical change.

Back

Baking cupcakes, as it involves a chemical reaction that produces new substances.

Front

Give an example of a physical change.

Back

Melting ice, as it changes from solid to liquid but remains water.

Front

What happens to the particles in a solid?

Back

They are tightly packed and vibrate in place.

Front

What happens to the particles in a liquid?

Back

They are close together but can move past one another, allowing liquids to flow.

Front

What happens to the particles in a gas?

Back

They are far apart and move freely, filling the space available.

Front

What is rusting an example of?

Back

A chemical change, as iron reacts with oxygen to form iron oxide.

Front

What is the main difference between physical and chemical changes?

Back

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

Front

What is an indicator of a chemical change?

Back

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