p 2.2

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of the reactants equals the total mass of the products.

Tags

NGSS.MS-PS1-5

Front

What happens to the mass of ice when it melts into water?

Back

The mass of ice remains the same when it melts into water; it is conserved.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the total mass of a system when a chemical reaction occurs in a closed container?

Back

The total mass of the system remains constant before and after the reaction.

Tags

NGSS.MS-PS1-5

Front

How does the mass of reactants compare to the mass of products in a chemical reaction?

Back

The mass of the reactants is equal to the mass of the products.

Tags

NGSS.MS-PS1-5

Front

What is an example of a closed system in a chemical reaction?

Back

A closed container where no mass can enter or leave during the reaction.

Tags

NGSS.MS-PS1-5

Front

What is the significance of using a sealed container in experiments involving combustion?

Back

Using a sealed container prevents the escape of gases, allowing for accurate measurement of mass before and after the reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the expected outcome when combining substances in a sealed jar?

Back

The total mass of the substances before the reaction will equal the total mass after the reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the relationship between mass and phase changes, such as melting and evaporation?

Back

Mass is conserved during phase changes; the mass before and after the change remains the same.

Tags

NGSS.MS-PS1-5

Front

What is the role of gas bubbles in a chemical reaction?

Back

Gas bubbles indicate a chemical reaction is occurring, but they do not change the total mass of the system.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the importance of measuring mass in scientific experiments?

Back

Measuring mass helps to verify the law of conservation of mass and ensures accurate results in experiments.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5