Describe the three steps of the Nitrogen Cycle. (2 points)
1. Nitrogen Fixation: The first step of the Nitrogen Cycle is nitrogen fixation, where nitrogen from the atmosphere is converted into a form that plants can use. This process is carried out by nitrogen-fixing bacteria found in the soil or in the roots of certain plants.
2. Nitrification: In the second step, nitrification occurs, where the nitrogen compounds in the soil are converted into nitrites and nitrates by nitrifying bacteria. This process makes the nitrogen available for plants to absorb and use for growth.
3. Denitrification: The final step of the Nitrogen Cycle is denitrification, where nitrogen compounds in the soil are converted back into nitrogen gas by denitrifying bacteria. This process releases nitrogen gas back into the atmosphere, completing the cycle.