cycle steps
What is the chemical formula for Nitrogen?
N2
Raw sewage typically contains a high amount of ______.
nitrogen
What are the two main nutrients in fertilizer? (the problematic ones)
Nitrogen and Phosphorus
What is crop rotation?
It is the practice of growing different crops in the same field from season to season
What is the first step in the Nitrogen cycle?
Nitrogen fixation (Nitrogen gas is converted into ammonia)
Why does denitrification occur?
to lower of the overall amount of nitrate (NO3-) and nitrite (NO2-) within the sewage being processed.
What is the main cause of eutrophication?
Fertilizers/fertilizer runoff
What is a benefit of crop rotation?
It restores top soil nutrients while reducing erosion
What is the final step of the nitrogen cycle?
denitrification
What is the end product of denitrification? (output)
nitrogen gas
Why are some organisms not able to get sunlight due to eutrophication?
Because algal blooms cover the surface which blocks the sunlight from reaching other organisms like fish
What does Crop rotation help reduce the use of
Nitrogen Fertilizer
What two things do nitrogen fixation?
bacteria and lightning
What does denitrification lower the quantity of?
nitrate/nitrite in water/substances
What are the two causes of oxygen depletion?
Algae eat up the oxygen to survive and the process of decomposition (of algae) requires oxygen.
Example of a legume plant
Soybeans
Plants absorb organic nitrogen through their _______.
root nodules
Ammonia is converted into nitrite through the process of ______
nitrification
List the two reasons that algae cause other organisms in the water to die?
blocks sunlight, uses up all the oxygen
Fill in the sentence, they plant a legume such as soybeans whose ______ add nitrogen to the soil.
root nodules