can you make the nitrogen cycle a little more understanding.?

Answer 1

These 6 steps are all you have to remember:

1. Nitrogen is essential for many biological processes; it is in all amino acids, proteins, and in DNA. In plants, much of the nitrogen is used in chlorophyll molecules which are essential for photosynthesis and growth.

2. Plants and animals cannot use nitrogen gas directly so processing, or fixation, is necessary to convert gaseous nitrogen into forms usable by living organisms.

3. Bacteria in the soil "fix" the nitrogen by forming nitrates (compounds) out of nitrogen gas. Nitrogen which has been 'fixed' is now available for plants to absorb. It can now be dissolved in water and absorbed through the roots of plants.

4. The nitrates are incorporated by the plants to form proteins, which can then be spread through the food chain.

5. When organisms excrete wastes, nitrogen is released into the environment as a gas. Also, whenever an organism dies, decomposers (bacteria and other animals) break down the corpse into nitrogen (amonia).

6. This nitrogen can then be used again and the cycle repeats.

Hope this helps

Answer 2

The nitrogen cycle consists of five basic steps. The first step is Nitrogen fixation where bacteria (rhizobium) in the soil convert nitrogen gas, N2, (which is in the air) to ammonia (NH3). The next step is Nitrification, here the ammonia is converted to a nitrate (NO3) by aerobic soil bacteria. In the third step which is called assimilation, ammonia or nitrates are taken into plants and turned into nitrogen containing organic compounds. After plants die or are eaten, then excreted, the next step occurs which is ammonification, here the nitrogen containing organic compounds decompose and give off ammonia among other things. The last step is denitrification where nitrates are converted to nitrogen gas (N2) by anaerobic bacteria.

Answer 3

atmospheric nitrogen -------> nitrates (BIOLOGICAL, physical or industrial fixation) [the reverse action is denitrification)
plant and animal proteins--------> ammonia -------> nitrites -------> nitrates.

place nitrates in the centre of the page, atmospheric nitrogen above nitrates and plant proteins, etc....... below nitrates, better if nitrates is placed in a box.