Question

  Which of the following process is/are part of the carbon cycle? 

 i. Photosynthesis 

ii. Microbial decomposition

 iii. Formation of fossil fuels

 iv. Combustion in cars

• A. i and ii only
• B. i, ii and iii only
• C. ii and iii only
• D. i, ii, iii and iv

Answer 1

Answer:

C. ii and iii only

The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. Carbon is the main component of biological compounds as well as a major component of many minerals such as limestone. Along with the nitrogen cycle and the water cycle, the carbon cycle comprises a sequence of events that are key to make Earth capable of sustaining life.