Law of Conservation: Open & Closed

If an experiment is conducted, what can you predict the mass of the products to be?

• less than the mass of the reactants

• more than the mass of the reactants

• the same as the mass of the reactants

• the mass of the products is not measureable

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Matter states,

• matter cannot be created, but can be destroyed

• matter can be created in a chemical reaction

• matter cannot be created unless a chemical reaction occurs

• matter cannon be created nor destroyed

Tags

NGSS.MS-PS1-5

When is the Law of Conservation of Mass broken?

• during a reaction

• when a gas is formed

• never

• it depends on the experiment

Tags

NGSS.MS-PS1-5

When conducting an experiment, David noticed his mass of the products is less than his mass of the reactants. Why could this be?

• the mass of the products will always be less

• he did not use a closed container/system to capture the gas matter

• the mass of the products will always be more

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When identifying a balanced equation,

• the number of molecules in the reactants should always be the same as the number of molecules in the products

• the number of atoms in the reactants should always be the same as the number of atoms in the products

• new elements should form

• the reactants should look the exact same as the products

Tags

NGSS.MS-PS1-5

• Balanced

• Unbalanced

• Not enough information

Tags

NGSS.MS-PS1-5

• Balanced

• Unbalanced

• Not enough information

Tags

NGSS.MS-PS1-5

• Balanced

• Unbalanced

• Not enough information

Tags

NGSS.MS-PS1-5

• Balanced

• Unbalanced

• Not enough information

Tags

NGSS.MS-PS1-5

Which equation matches the picture?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5