Carbon Cycle and Law of Conservation

How do plants adhere to the law of conservation of mass in the process of photosynthesis, where they absorb carbon dioxide, water, and solar energy to generate carbohydrates and oxygen?

• The amount of each element in the reactants equals the amount of each element in the products.

• The number of carbon dioxide molecules taken in exactly equals the number of carbohydrate molecules produced.

• The plant uses the carbon dioxide gas, liquid water, and energy to produce a solid carbohydrate.

• The plant's mass does not increase or decrease as a result of photosynthesis.

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NGSS.MS-LS1-6

NGSS.MS-PS1-5

How can the adherence to the law of conservation of mass in living systems be demonstrated through the following observations?

• The total mass of a dead organism equals the total mass of matter released to the environment by decomposition.

• Most plants and animals begin their life cycle with a smaller mass and gain mass during development.

• The total mass of all organisms in an ecosystem remains the same over time.

• Living animals must consume food with a mass much greater than the mass of their body over their lifetime.

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How does carbon get into the soil?

• when a human dies

• When a plant dies

• when an animal dies

• all of the above

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NGSS.MS-LS2-3

Where is Carbon found in ecosystems? Choose the best answer.

• in all living things

• in the soil

• in rocks and dirt

• in the biosphere

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NGSS.MS-LS2-3

What are the two main reservoirs for carbon dioxide?

• Ocean, fossil fuels

• Ocean, atmosphere

• Atmosphere, fossil fuels

• Calcium Carbonate, ocean

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NGSS.HS-ESS2-6

Which of the following removes carbon from the atmosphere?

• Combustion

• Respiration

• Photosynthesis

• Death

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NGSS.MS-LS1-6

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water

• Atmosphere

• Sun

• Air

Why are the nitrogen, carbon, and water cycles described as “cycles”?

• They have a beginning and an end.

• They are continuous processes that have no beginning or end.

• Their processes form circles.

• Like a food chain, they are one-way.

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NGSS.MS-ESS2-4

This cycle is important to understand in ecology because its element makes up a majority of organisms (living things).

• Nitrogen cycle

• Water cycle

• Carbon cycle

• Rock cycle

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In the Law of Conservation of Mass/Energy they cannot be...

• Transferred & Transformed

• Created & Destroyed

• Moved & Changed

• Burned & Buried

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NGSS.MS-PS1-2

NGSS.MS-PS1-5