IB Carbon Cycle

What are the main sources of carbon dioxide on earth?

• Cellular respiration of consumers, producers and combustion of fossil fuels

• Photosynthesis and cellular respiration of consumers

• Cellular respiration of producers and combustion of fossil fuels

• Photosynthesis and combustion of fossil fuels

Which group of organisms in the carbon cycle converts carbon into a form that is available to primary consumers?

• Decomposers

• Saprotrophs

• Detritivores

• Producers

Tags

NGSS.MS-LS2-3

The diagram below shows some of the links in the carbon cycle.

What processes are taking place at I, II and III?

• I = photosynthesis; II = fossilization; III = combustion

• I = respiration; II = fossilization; III = decomposition

• I = photosynthesis; II = decomposition; III = combustion

• I = respiration; II = decomposition; III = greenhouse effect

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following provides the greatest carbon flux in the carbon cycle?

• respiration

• photosynthesis

• combustion

• decomposition

Which of the following fixes carbon from CO₂ into organic molecules?

• respiration

• digestion

• photosynthesis

• decomposition

Tags

NGSS.MS-LS1-6

Which of the following is/are true of an ecosystem?

I. nutrients are recycled

II. communities interact with their abiotic environment

III. energy is recycled

• I only

• II only

• I and II only

• II and III only

Tags

NGSS.MS-LS2-3

Which of the following represents a negative carbon flux?

• decomposition

• respiration

• combustion

• photosynthesis

Tags

NGSS.HS-LS2-5

Which conditions are needed to form peat?

• Aerobic and acidic

• Aerobic and alkaline

• Anaerobic and acidic

• Anaerobic and alkaline

What is peat formed from?

• partially decomposed plants

• partially decomposed animals

• coal

• oil

Tags

NGSS.MS-LS2-3

What is formed from the fossilization of peat?

• oil

• natural gas

• coal

• diesel

Tags

NGSS.MS-ESS3-1