Law of Conservation of Mass

Front

What does the Law of Conservation of Mass state?

Back

Mass cannot be created or destroyed in chemical and physical changes.

Front

Does the Law of Conservation of Mass apply only to physical changes?

Back

False, it applies to both physical and chemical changes.

Front

What is an example of a chemical change during a picnic?

Back

Cooking hamburgers on the grill.

Front

If you weigh a tray of building blocks before and after building a house, what will happen to the weight?

Back

They will weigh the same. This is a physical change.

Front

What is mass?

Back

Mass is the amount of matter in an object.

Front

Can mass be created or destroyed?

Back

No, according to the Law of Conservation of Mass, mass cannot be created or destroyed.

Front

What happens to the total mass in a closed system during a chemical reaction?

Back

The total mass remains constant.

Front

Give an example of a physical change.

Back

Melting ice.

Front

What is a chemical change?

Back

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

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without changing its chemical composition.