Conservation of Mass Practice

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that substances can neither be created nor destroyed.

Tags

NGSS.MS-PS1-5

Front

If an ice cube with a mass of 25 grams melts, what is the mass of the resulting liquid water?

Back

The mass of the resulting liquid water is 25 grams.

Tags

NGSS.MS-PS1-5

Front

In a chemical reaction, if the mass of the reactants is 15g and the mass of the products is 12g, does this follow the law of conservation of mass?

Back

No, it does not follow the law of conservation of mass.

Tags

NGSS.MS-PS1-5

Front

What can happen in an open system during an experiment?

Back

In an open system, some mass can escape.

Tags

NGSS.MS-PS1-5

Front

What type of system is a boiling pot of water on a stove?

Back

A boiling pot of water on a stove is an open system.

Tags

NGSS.MS-PS1-4

Front

Define a closed system in the context of mass conservation.

Back

A closed system is one where no mass can enter or leave, so the total mass remains constant.

Tags

NGSS.MS-PS1-5

Front

What is an example of a chemical reaction that follows the law of conservation of mass?

Back

Combustion of hydrogen gas in oxygen to form water, where the total mass of reactants equals the total mass of products.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to the mass of substances during a physical change?

Back

The mass of substances remains the same during a physical change.

Tags

NGSS.MS-PS1-4

Front

What is the significance of the law of conservation of mass in chemical reactions?

Back

It ensures that the mass of reactants equals the mass of products, indicating that atoms are rearranged but not created or destroyed.

Tags

NGSS.MS-PS1-5

Front

How can you demonstrate the law of conservation of mass with a simple experiment?

Back

By measuring the mass of reactants before and after a reaction in a closed container.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5