Carbon Cycle Quiz Questions

1. Why is carbon such an important element?

A Because carbon is a key element in producing electricity B All of the above C Because carbon is the central element to all living organisms D Because without carbon the Sun would run out of energy

2. What are processes that remove carbon from the atmosphere called?

A Sources B Cycles C Sinks D Carbonates

3. What are processes that add carbon to the atmosphere called?

A Carbonates B Sinks C Cycles D Sources

4. Which part of the carbon cycle involves animals breathing in oxygen and out carbon dioxide?

A Respiration B Decay C The oceans D Photosynthesis

5. Which part of the carbon cycle occurs when plants or animals die?

A Decay B Photosynthesis C The oceans D Respiration

6. Which part of the carbon cycle occurs when plants convert sunlight and C02 into oxygen and sugar?

A Decay B Respiration C The oceans D Photosynthesis

7. Which part of the carbon cycle occurs when plants, trees, or fossil fuels are burned?

A Combustion B Photosynthesis C Respiration D The oceans

8. Which part of the carbon cycle involves sea creatures using carbonic acid to make their shells?

A Respiration B Photosynthesis C The oceans D Decay

9. True or False: Some carbon is needed in the atmosphere to keep the Earth warm.

A FALSE B TRUE

10. How has man influenced the carbon cycle and increased the amount of carbon in the atmosphere?

A Cutting down trees B Burning coal C All of the above D Burning oil

11. This factor contributes to the carbon cycle

A fossil fuel combustion B respiration C photosynthesis D all of these

12. The source of carbon to plants in the carbon cycle is

A fossil fuels B carbonate rocks C atmospheric carbon dioxide D all of the above

13. The role of bacteria in the carbon cycle is

A Breakdown of organic compounds B Chemosynthesis C Photosynthesis D Assimilation of nitrogen compounds

14. In the carbon cycle, the human body returns carbon to the atmosphere through this way:

A formation of glucose B waste products C photosynthesis D cellular respiration

15. Respiration and photosynthesis are central to this process

A nitrogen cycle B phosphorous cycle C carbon cycle D sulphur cycle

16. The difference between the phosphorous cycle and carbon cycle lies in the fact that

A the phosphorous cycle does not include a gaseous phase but the carbon cycle does B phosphorous does not enter living entities but carbon enters C the phosphorous cycle includes a solid phase, the carbon cycle does not D primary reservoir of the phosphorous cycle is the atmosphere, but rocks are the primary reservoirs for carbon cycle

17. Most of the global warming is due to the perturbation of which of these cycles?

A Global nitrogen cycle B Global carbon cycle C Global water cycle D All of these cycles equally contribute

18. This carbon isotope is radioactive and very rare

A Carbon – 11 B Carbon – 12 C Carbon – 13 D Carbon – 14

19. By this method, the majority of carbon moves from the lithosphere to the atmosphere

A erosion B deposition C weathering D fossil fuel burning

20. These entities sequester most carbon from the atmosphere

A Plants B Archaea C Bacteria D Insects