Conservation of Matter

As this candle burns it gets shorter. Where does the wax go?

• wax goes into the air

• disappears

• melts into the candle

• burns and releases gases into the air

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

NGSS.MS-PS1-4

If you could weigh a sealed air bag before and after it inflates, the weight would do what?

• increase

• decrease

• go to zero

• stay the same

What makes cinnamon rolls get bigger when you bake them?

• more matter

• gas bubbles get smaller

• more energy

• gas bubbles get larger

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Where did Zoe's flash paper go when it disappeared?

• converted to gas

• converted into pure energy

• into the candle

• she hid it in her hand

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NGSS.MS-PS1-5

NGSS.MS-PS1-2

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction

• Mass is created in a physical change

• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

• Mass is never created or destroyed

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NGSS.MS-PS1-5

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms

• 2 oxygen atoms

• 3 oxygen atoms

• 4 oxygen atoms

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NGSS.MS-PS1-1

Which side of a chemical equation is the reactant side?

• Left (before the yields sign)

• Right (after the yields sign)

What does the Law of Conservation of Matter state?

• Matter can be created and destroyed.

• Matter can change forms but is not created or destroyed.

• Matter is only conserved in closed systems.

• Matter is only conserved in open systems.

Tags

NGSS.MS-PS1-5

In a closed system, if you start with 10 grams of reactants, how much product should you expect according to the Law of Conservation of Matter?

• 0 grams

• 5 grams

• 10 grams

• 20 grams

Tags

NGSS.MS-PS1-5

Which of the following is an example of the Law of Conservation of Matter in a chemical reaction?

• Burning wood and losing mass as ash.

• Dissolving sugar in water and the mass of the solution remains the same.

• Evaporation of water leading to a decrease in mass.

• Rusting of iron increasing the mass.

Tags

NGSS.MS-PS1-5