Changes in Matter

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

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.

Front

Give an example of a chemical change.

Back

Photosynthesis is an example of a chemical change.

Front

Give an example of a physical change.

Back

Making orange juice is an example of a physical change.

Front

What are some signs of a chemical change?

Back

Signs of a chemical change include fizzing, foaming, color change, heat production, and gas formation.

Front

What is tarnishing?

Back

Tarnishing is a chemical change that occurs when metals like copper react with oxygen and moisture in the air, forming a layer of corrosion.

Front

What does it mean when a gas is formed during a reaction?

Back

The formation of a gas during a reaction indicates that a chemical change has occurred.

Front

What is a precipitate?

Back

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

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change results in the formation of new substances.

Front

What is an example of a clue that a chemical reaction has taken place?

Back

Fizzing is an example of a clue that a chemical reaction has taken place.