1. The atmosphere is 80% nitrogen: why do you think plants and animals can't use nitrogen as it is found in the atmosphere? Plants and animals can't use nitrogen because it cannot absorb nitrogen in its gaseous form.
2. Explain what is meant by nitrogen fixation. Nitrogen Fixation occurs when bacteria convert nitrogen gas into organic compounds that living organisms can take up.
3. What is the role of bacteria in the nitrogen cycle? it fixes the nitrogen released by lightning strikes
4.Why don't legumes need nitrogen-containing fertilizers? because legumes provide the bacteria with energy-rich carbohydrates so it don't need fertilizers
5.Why is nitrogen so important for living things? Nitrogen is important for living things because it is a key building block in a number of important molecules, such as nucleic acids, amino acids, and proteins
6. What are the processes involved in the nitrogen cycle? Nitrogen Fixation, Decomposition, Ammonification, Assimilation, Dentrification, and
Nitrification.
