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Cycles (carbon and nitrogen)

Last updated over 1 year ago

12 questions

Note from the author:

Review Cycle (mostly the carbon cycle, one nitrogen cycle question) for the MCAS

1

Which of the processes shown in the diagram is responsible for cycling carbon from the atmosphere to the biosphere?

1

The geosphere is the earth's crust (oil deposits and rock). Which of the processes shown in the diagram is responsible for cycling carbon from the geosphere back into the atmosphere? Hint: you are burning fossil fuels found in the earth

1

Which of the following occurs during photosynthesis?

1

The diagram below represents a cycle in an ecosystem. Which of the following do the arrows most likely represent?

1

Carbon fixation is an important part of the carbon cycle. Carbon fixation is the conversion of carbon dioxide into organic compounds such as glucose.

Which of the following organisms cannot fix carbon?

1

Volcanic eruptions add carbon dioxide to the atmosphere. Which of the following also adds carbon dioxide directly to the atmosphere?

1

Earth’s atmosphere is 20.9% molecular oxygen (O2). Which process provides most of the oxygen in the atmosphere?

1

What biological process removes carbon from the atmopshere?

1

What biological process adds carbon to the atmopshere?

1

In the past 100 years, levels of atmospheric carbon dioxide have increased as the result of burning fossil fuels. Other processes in the carbon cycle have absorbed some of the carbon released by this combustion. Which of the following most likely have absorbed excess carbon released by combustion?

1

If a law was passed to reduce the amount of fossil fuels emitted each year, what would happen to the amount of carbon released into the atmosphere?

1

Which of the following occurs during decomposition?