The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted
into various chemical forms as it circulates among the atmosphere and terrestrial
This module provides an overview of the nitrogen cycle and the chemical
changes that govern the cycle.
The Nitrogen Cycle. All life requires nitrogen-compounds, e.g., proteins and
nucleic acids. Air, which is 79% nitrogen gas (N2), is the major reservoir of
The Nitrogen Cycle. Take a deep breath. Most of what you just inhaled is nitrogen
. In fact, 80% of the air in our atmosphere is made of nitrogen. Your body does ...
Kids learn about the nitrogen cycle and how this nutrient travels through the
ecosystem to sustain life on Earth.
The nitrogen cycle represents one of the most important nutrient cycles found in
terrestrial ecosystems (Figure 9s-1). Nitrogen is used by living organisms to ...
Nitrogen is one of the primary nutrients critical for the survival of all living
organisms. Although nitrogen is very abundant in the atmosphere, it is largely ...
The Chemical Cycles. The Nitrogen Cycle Organisms require nitrogen to produce
amino acids. Nitrogen makes up seventy-eight percent of the atmosphere, but ...
Nitrogen is important to all life. Nitrogen in the atmosphere or in the soil can go
through many complex chemical and biological changes, be combined into living
The earthly matter cycle of nitrogen. ... Part II of "Matter cycles": The nitrogen cycle
... Nitrosomonas bacteria first convert nitrogen gas to nitrite (NO2<sup>-</sup>) and ...