Exploring the Conservation of Matter in Chemical Reactions

What does the law of conservation of matter state?

• Matter can be created and destroyed.

• Matter can only be destroyed.

• Matter cannot be created or destroyed.

• Matter can only be created.

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Why do scientists use models in physical science?

• To create new scientific laws.

• To avoid using real materials.

• To replace real experiments.

• To make complex concepts easier to understand.

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What is the purpose of combining the red and blue bricks in the demonstration?

• To show the limitations of models.

• To demonstrate the destruction of matter.

• To illustrate the concept of reactants and products.

• To show how new matter is created.

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What is the final product when a blue brick, yellow brick, and red brick are combined?

• A stack made of all three bricks.

• A single yellow brick.

• A single blue brick.

• A single red brick.

How many total bricks are used to build the wall in the demonstration?

• 7

• 6

• 5

• 8

What is the total mass of the wall built with 4 blue bricks, 3 red bricks, and 1 yellow brick?

• 15 grams

• 21 grams

• 18 grams

• 24 grams

In the chemical reaction example, what are the reactants?

• Carbon and nitrogen

• Hydrogen and nitrogen

• Oxygen and carbon

• Hydrogen and oxygen

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How many molecules of water are produced in the chemical reaction example?

• Two

• Four

• One

• Three

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What is the total mass of the products in the chemical reaction example?

• 40 grams

• 32 grams

• 28 grams

• 36 grams

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What is one of the coolest implications of the law of conservation of matter and mass?

• Matter can be created from nothing.

• Matter and mass are constantly increasing.

• Matter can be destroyed completely.

• The matter and mass in the universe are the same as at the beginning.

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