Exploring the Law of Conservation of Mass

What are the substances called that go into a chemical reaction?

• Products

• Reactants

• Catalysts

• Inhibitors

Tags

NGSS.MS-PS1-1

In the baking soda and vinegar experiment, what was observed about the mass?

• It decreased

• It fluctuated

• It increased

• It stayed the same

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What would happen to the mass if the baking soda and vinegar experiment was done inside a plastic bag?

• The mass would fluctuate

• The mass would stay the same

• The mass would decrease

• The mass would increase

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Why did the plastic bag puff up during the experiment?

• Because of the formation of a solid

• Because of the release of gases

• Because of the absorption of liquids

• Because of the increase in temperature

Tags

NGSS.MS-PS1-4

What does the law of conservation of mass state?

• Mass remains constant in a closed system

• Mass can be destroyed

• Mass fluctuates in a closed system

• Mass can be created

Tags

NGSS.MS-PS1-5

In the example with sodium hydroxide and hydrochloric acid, how many chlorine atoms are present in the reactants?

• Four

• Three

• Two

• One

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

How many hydrogen atoms are present in the products of the sodium hydroxide and hydrochloric acid reaction?

• One

• Two

• Four

• Three

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to matter during a chemical reaction?

• It disappears

• It is created

• It is destroyed

• It is rearranged

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the significance of keeping a system closed in a chemical reaction?

• To decrease the mass

• To ensure mass remains constant

• To increase the mass

• To allow gases to escape

Tags

NGSS.MS-PS1-5

What does the law of conservation of mass imply about the atoms in our bodies?

• They are newly created

• They disappear after a while

• They are the same atoms that existed in the past

• They are destroyed over time

Tags

NGSS.MS-PS1-5