Question

the carbon cycle moves hundreds of billions of kilograms of carbon each year. which processes add or remove carbon from the atmosphere? place each process into the table to describe its direct impact on atmospheric carbon. adds carbon removes carbon both adds and removes carbon combustion of fossil fuels photosynthesis cellular respiration diffusion between ocean and atmosphere

Explanation:

Combustion of fossil fuels releases carbon - dioxide into the atmosphere, adding carbon. Photosynthesis uses carbon - dioxide from the atmosphere, removing carbon. Cellular respiration by organisms releases carbon - dioxide into the atmosphere (adds carbon), but plants also take in oxygen and release carbon - dioxide during respiration while also doing photosynthesis which removes carbon, so it both adds and removes carbon. Diffusion between ocean and atmosphere can add or remove carbon depending on the concentration gradients, so it both adds and removes carbon.

Answer:

Adds carbon: Combustion of fossil fuels
Removes carbon: Photosynthesis
Both adds and removes carbon: Cellular respiration, Diffusion between ocean and atmosphere