The nitrogen cycle is a biogeochemical process that describes the movement of nitrogen through the a...
The nitrogen cycle is a biogeochemical process that describes the movement of nitrogen through the atmosphere, lithosphere, hydrosphere, and biosphere. It involves several key processes including nitrogen fixation, where atmospheric nitrogen (N2) is converted into ammonia (NH3) by bacteria; nitrification, in which ammonia is oxidized to nitrites (NO2-) and then to nitrates (NO3-); and denitrification, where nitrates are converted back into nitrogen gas, returning it to the atmosphere. This cycle is crucial for maintaining soil fertility and supporting plant growth, as nitrogen is an essential nutrient for all living organisms.
Carbon Cycle
The carbon cycle is the process by which carbon atoms are cycled through the Earth's ecosystems, atm...
The carbon cycle is the process by which carbon atoms are cycled through the Earth's ecosystems, atmosphere, oceans, and geological formations. It involves several key processes including photosynthesis, where plants absorb carbon dioxide (CO2) from the atmosphere and convert it into organic matter; respiration, where living organisms release CO2 back into the atmosphere; and decomposition, where dead organic matter is broken down, returning carbon to the soil and atmosphere. The carbon cycle is vital for regulating the Earth's climate, as it helps control the concentration of greenhouse gases and supports the energy flow in ecosystems.