Nitrogen returns to the atmosphere through a process called
• nitrogen cycle.
• denitrification.
• nitrification.
• nitrogen fixation.
denitrification.
The correct answer is denitrification.
Denitrification is the process by which nitrogen returns to the atmosphere in the form of nitrogen gas (N2). It occurs primarily in soil and aquatic environments, where specialized bacteria convert nitrate (NO3-) back into nitrogen gas. This process completes the nitrogen cycle, which refers to the series of interconnected processes by which nitrogen is converted and recycled in the environment.
To find the answer to this question, you could start by familiarizing yourself with the nitrogen cycle and its various stages. Understanding the different processes involved, such as nitrogen fixation, nitrification, and denitrification, would be crucial. Additionally, you might find it helpful to review how each process contributes to the overall cycle. By understanding these concepts, you can determine that denitrification is the correct process through which nitrogen returns to the atmosphere.