Question
Carbon Cycle and Nitrogen Cyde.
| Carbon Cycle | Nitrogen Cycle |
| (i) The circulation and recycling of carbon from the atmosphere to living organisms and after their death back to the atmosphere is called the carbon cycle. | (i) The circulation and recycling of nitrogen into the form of different compounds through various biotic and abiotic processes in nature is called the nitrogen cycle. |
| (ii) Main processes involved in the carbon cycle are photosynthesis and respiration. | (ii) Main processes involved in the nitrogen cycle are nitrogen fixation, ammonification, nitrification and denitrification. |
| (iii) Carbon in the form of carbon dioxide is directly absorbed by plants for photosynthesis. | (iii) Nitrogen gas cannot be directly absorbed by plants. So nitrogen is fixed by the process of nitrogen fixation and then absorbed from the soil. |
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