Law of conservation of matter video quiz

What principle states that the total amount of matter remains constant during a phase change?

• Law of Conservation of Energy

• Principle of Quantum Mechanics

• Law of Conservation of Mass

• Theory of Relativity

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If all the water in a pot is boiled into steam, will the mass of the steam be equal, less, or more than the water before boiling?

• More

• Equal

• Less

• Cannot be determined

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What is the outcome when water changes from liquid to gas phase?

• Mass disappears

• Mass remains the same

• Mass decreases

• Mass increases

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Why do we balance chemical equations?

• To ensure equal volume on both sides

• To make them look symmetrical

• To obey the law of conservation of matter

• To use up all reactants

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What is the significance of balancing equations in chemistry?

• To make them easier to solve

• To follow the law of conservation of matter

• To identify the reactants and products

• To simplify the equations

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What happens to the mass of a copper pipe when it rusts?

• It decreases

• It remains the same

• It increases

• It first increases then decreases

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What adds mass to a copper pipe during the rusting process?

• Carbon dioxide

• Water molecules

• Oxygen molecules

• Nitrogen molecules

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Why does the mass of a rusty pipe increase?

• Oxygen from the air bonds with the pipe

• Due to the accumulation of dust

• Because of water absorption

• It absorbs heat from the surroundings

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What demonstrates the law of conservation of matter in our daily diet?

• Eating and digesting food

• Exercising

• Breathing

• Sleeping

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How does the law of conservation of matter apply to eating a big burrito?

• It's digested and converted into energy

• It adds mass to the body

• It's completely expelled as waste

• It vanishes into thin air

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