Question

sort each of these into either a physical process, or a biological/chemical process of the carbon cycle
physical process in carbon cycle
sedimentation
chemical / biological process in the carbon cycle
respiration / photosynthesis
assimilation
combustion
decomposition

Explanation:

Sedimentation is a physical process where particles settle out of a fluid. Respiration/photosynthesis are biological - chemical processes related to energy production and carbon - dioxide/oxygen exchange in living organisms. Assimilation is a biological process where organisms incorporate nutrients. Combustion is a chemical process of burning. Decomposition is a biological/chemical process where organic matter is broken down by organisms or chemical reactions.

Answer:

Physical process in Carbon cycle: sedimentation
Chemical / Biological process in the carbon cycle: respiration/photosynthesis, assimilation, combustion, decomposition