Question

1
Complete the following table (Carefully study the carbon, oxygen and nitrogen cycles).
Bio-geo-chemical cycles Biotic
Abiotic processes
processes
1. Carbon cycle
2. Oxygen cycle
3. Nitrogen cycle​

Answer 1

Answer:

Humans have changed the natural carbon cycle by burning fossil fuels, which releases carbon dioxide into the atmosphere. ... The nitrogen cycle begins with nitrogen gas in the atmosphere then goes through nitrogen-fixing microorganisms to plants, animals, decomposers, and into the soil.

Humans have changed the natural carbon cycle by burning fossil fuels, which releases carbon dioxide into the atmosphere. ... The nitrogen cycle begins with nitrogen gas in the atmosphere then goes through nitrogen-fixing microorganisms to plants, animals, decomposers, and into the soil.

   Nitrogen fixation. Atmospheric nitrogen occurs primarily in an inert form (N2) that few organisms can use; therefore it must be converted to an organic – or fixed – form in a process called nitrogen fixation. ...

   Nitrification. ...

   Assimilation. ...

   Ammonification. ...

   Denitrification.

Explanation: