Quiz  /  Carbon Cycle

  • 1. 
    Why is carbon such an important element?

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

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

  • Sources
  • Cycles
  • Sinks
  • Carbonates

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

  • Carbonates
  • Sinks
  • Cycles
  • Sources

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

  • Respiration
  • Decay
  • The oceans
  • Photosynthesis

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

  • Decay
  • Photosynthesis
  • The oceans
  • Respiration

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

  • Decay
  • Respiration
  • The oceans
  • Photosynthesis

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

  • Combustion
  • Photosynthesis
  • Respiration
  • The oceans

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

  • Respiration
  • Photosynthesis
  • The oceans
  • Decay

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

  • FALSE
  • TRUE

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

  • Cutting down trees
  • Burning coal
  • All of the above
  • Burning oil

  • 11. 
    This factor contributes to the carbon cycle

  • fossil fuel combustion
  • respiration
  • photosynthesis
  • all of these

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

  • fossil fuels
  • carbonate rocks
  • atmospheric carbon dioxide
  • all of the above

  • 13. 
    The role of bacteria in the carbon cycle is

  • Breakdown of organic compounds
  • Chemosynthesis
  • Photosynthesis
  • Assimilation of nitrogen compounds

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

  • formation of glucose
  • waste products
  • photosynthesis
  • cellular respiration

  • 15. 
    Respiration and photosynthesis are central to this process

  • nitrogen cycle
  • phosphorous cycle
  • carbon cycle
  • sulphur cycle

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

  • the phosphorous cycle does not include a gaseous phase but the carbon cycle does
  • phosphorous does not enter living entities but carbon enters
  • the phosphorous cycle includes a solid phase, the carbon cycle does not
  • 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?

  • Global nitrogen cycle
  • Global carbon cycle
  • Global water cycle
  • All of these cycles equally contribute

  • 18. 
    This carbon isotope is radioactive and very rare

  • Carbon – 11
  • Carbon – 12
  • Carbon – 13
  • Carbon – 14

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

  • erosion
  • deposition
  • weathering
  • fossil fuel burning

  • 20. 
    These entities sequester most carbon from the atmosphere

  • Plants
  • Archaea
  • Bacteria
  • Insects
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