Question

Classify each of the following statements related to the phosphorus, nitrogen, and carbon cycles as either true or false.

a) Phosphorus is primarily found in the atmosphere.
b) Nitrogen fixation is a process that converts nitrogen gas into ammonia.
c) Combustion of fossil fuels releases carbon dioxide into the atmosphere.
d) Decomposition returns phosphorus to the soil.

Answer 1

Phosphorus is not primarily found in the atmosphere. Nitrogen fixation converts nitrogen gas into ammonia. Combustion of fossil fuels releases carbon dioxide into the atmosphere. Decomposition returns phosphorus to the soil.

Step-by-step explanation:

a) False. Phosphorus is primarily found in rocks and sediments, not in the atmosphere.

b) True. Nitrogen fixation is the process by which nitrogen gas (N2) is converted into ammonia (NH3) or ammonium ion (NH4+), which can be used by plants.

c) True. Combustion of fossil fuels releases carbon dioxide (CO2) into the atmosphere.

d) True. Decomposition of organic matter can return phosphorus to the soil.