The Law of Conservation of Matter

1. What does the law of conservation of matter state?

• Matter can be created from energy.
• Matter can be destroyed in chemical reactions.
• Matter can exist in only one form at a time.
• Matter cannot be created or destroyed, only transformed.

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NGSS.MS-PS1-5

2. Who is credited with the discovery of the law of conservation of matter?

• Albert Einstein
• Isaac Newton
• Antoine Lavoisier
• Niels Bohr

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NGSS.MS-PS1-5

3. What happens to the total mass during a chemical reaction according to the law of conservation of matter?

• The total mass remains constant.
• The total mass can change depending on the reaction type.
• The total mass decreases during a reaction.
• The total mass increases during a reaction.

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NGSS.MS-PS1-5

4. In the example of rusting, what remains the same?

• The structure of iron becomes more complex during rusting.
• The number of reactants and products.

• The weight of iron increases after rusting.
• The temperature.

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NGSS.MS-PS1-5

5. What happens to the molecules of water when it evaporates?

c. They become solid.
d. They turn into a gas that is not water.

• They stay the same but move further apart.

• They disappear completely.

• hey become solid.

• They turn into a gas that is not water.

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NGSS.MS-PS1-4