Conservation of Matter

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What is the law of conservation of matter?

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The law of conservation of matter states that matter cannot be created or destroyed in an isolated system; it can only change forms.

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How can you demonstrate the conservation of matter in a chemical reaction?

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By measuring the mass of reactants before the reaction and the mass of products after the reaction, you will find that the total mass remains constant.

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What happens to the mass of a sealed container when a gas is produced inside it?

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The mass of the sealed container remains the same, as the gas produced does not escape.

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What is the role of gas bubbles in baking cinnamon rolls?

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Gas bubbles expand when heated, causing the dough to rise and the cinnamon rolls to get bigger.

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Front

In the fire snake demo, what was observed about the weight before and after the reaction?

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The weight was about the same before and after the reaction, demonstrating conservation of matter.

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NGSS.MS-PS1-5

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What happens to the mass of sugar when it dissolves in water?

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The mass of the sugar and water combined remains the same; it is the total mass of the solution that is measured.

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Where does the matter go when a substance burns and weighs less afterward?

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The matter escapes as gas, which may not be captured in the weight measurement.

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What is an example of a physical change that demonstrates conservation of matter?

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Dissolving salt in water is a physical change where the total mass remains the same before and after.

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How can you measure the conservation of matter in a closed system?

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By ensuring that no matter enters or leaves the system, you can measure the total mass before and after a process.

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What is the significance of measuring mass in experiments related to conservation of matter?

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Measuring mass helps to confirm that matter is conserved during physical and chemical changes.

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