Law of the Conservation of Mass

Everything in the universe has

• energy
• matter
• mass
• atoms

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112.43.c.9.A

Mass connects which two things

• protons and nuetrons
• matter and energy
• mass and gravity
• energy and gravity

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112.43.c.9.A

The Law of Conservation of Mass says that mass can neither be _____ nor _____

• gained; lost

• created; destroyed

• started; ended

• opened; closed

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112.43.c.9.A

What process in stars played a role in the formation of the universe?

• Evolution

• Photosynthesis

• Nuclear reactions

• Radiation

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112.43.c.9.A

Why is it important to balance a chemical equation? Use the following terms in your answer: reactants, products, coefficients, atoms (or molecules), and law of conservation of mass.

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112.43.c.9.A

Why is it difficult to prove the Law of Conservation of Mass when a gas is produced?

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112.43.c.9.A

Explain why the universe must be an isolated system to obey the Law of Conservation of Mass.

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112.43.c.9.A

112.43.c.9.B