Front

What type of change in matter occurs when milk curdles after mixing with vinegar?

Back

Chemical change

Front

What is an example of a physical change?

Back

Melting chocolate in a pan on the stove

Front

Which statement does NOT indicate a physical change?

Back

The apple appears brown in color after being cut into smaller pieces.

Front

What is the difference between chemical and physical changes?

Back

Chemical changes result in the formation of new substances, while physical changes do not change the substance's chemical identity.

Front

What are the signs of a chemical change?

Back

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

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

In the digestive system, which areas participate in chemical digestion?

Back

Locations P, R, and S.

Front

What happens to the molecules during a chemical change?

Back

The molecules rearrange to form new substances.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as freezing and melting.