Conservation of Mass

What is the relationship between atoms and molecules in a chemical reaction?

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NGSS.MS-PS1-1

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NGSS.MS-PS1-5

What does the Law of Conservation of Matter state?

• Matter can be created in an isolated system
• The total amount of matter changes in an isolated system
• The total amount of matter remains constant in an isolated system
• Matter can be destroyed in an isolated system

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NGSS.MS-PS1-5

What does a chemical reaction demonstrate visually?

• The transformation of matter
• The destruction of matter
• The creation of matter
• The rearrangement of matter

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NGSS.MS-PS1-2

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How can a visual representation using balls and sticks demonstrate a chemical reaction?

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NGSS.MS-PS1-2

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In a chemical reaction, the ______ of atoms changes.

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NGSS.MS-PS1-2

What is an example of a reaction that demonstrates the Law of Conservation of Matter?

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Can matter be created or destroyed in a chemical reaction?

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NGSS.MS-PS1-5

What does the concept of mass conservation mean in a chemical reaction?

• The mass of the products is always greater than the mass of the reactants
• The mass of the reactants is always greater than the mass of the products
• The total mass of the atoms remains the same before and after the reaction
• The mass of the atoms can change during a reaction

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NGSS.MS-PS1-5

How can models be used to represent chemical reactions?

• To represent the color changes in a reaction
• To demonstrate the rearrangement of atoms
• To show the change in temperature during a reaction
• To visualize the movement of electrons

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the Law of Conservation of Matter?

• Matter cannot be created or destroyed in a chemical reaction
• Matter can be created or destroyed in a chemical reaction
• Matter can be destroyed in a chemical reaction
• Matter can be created in a chemical reaction

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NGSS.MS-PS1-5