Download The Nitrogen Cycle

The Nitrogen Cycle
Vocabulary
Decomposers- organisms that break down dead or
decaying organisms, and in doing so they carry
out the natural process of decomposition. They use
organic substrates to get their energy, carbon and
nutrients for growth and development.
Decomposers use _________________ to
breakdown _________________ ____________.
Think, Pair, Share
Partner A: Explain the definition of decomposers to
Partner B.
Partner B: Explain the sentence and picture of
decomposers to Partner A.
You have 30 seconds to share your responses
Vocabulary
Nitrogen Fixation- a process in which nitrogen (N2) in
the atmosphere is converted into ammonium (NH4+)
or nitrogen dioxide (NO. 2), for example.
is the process of
__________ being converted to _______________
____________________ __________________
Think, Pair, Share
Partner A: Explain the definition of nitrogen fixation to
Partner B.
Partner B: Explain the sentence and picture of
Nitrogen Fixation to Partner A.
You have 30 seconds to share your responses
Vocabulary
Denitrification- a microbial facilitated process of
nitrate reduction that may ultimately produce nitrogen
(N2) through a series of intermediate gaseous
nitrogen oxide products.
____________ is converted to ___________ in
nitrogen fixation.
Think, Pair, Share
Partner A: Explain the definition of denitrification
to Partner B.
Partner B: Explain the sentence and picture of
denitrification to Partner A.
You have 30 seconds to share your responses
Nitrogen Requirements
nitrogen to
All organisms require ________
proteins
make amino acids that build ________.
nitrogen
 Many different forms of _________
biosphere
occur naturally in the __________.
78
gas (N2) makes up ___%
 Nitrogen ____
of
atmosphere
the ___________.

Nitrogen locations
outside the atmosphere
Ammonia (NH3), and other ions
___________
wastes and in _____
dead
are in animal ________
or ________
decaying organic matter.
 Nitrogen also is in the ______
ocean and
other large bodies of ______.
water
 Humans add nitrogen
_______ to the
biosphere when they apply plant
_________
fertilizer
________.

Nitrogen Fixation
________
Bacteria that live in ____
soil or on plant
roots
____ (legumes) use forms of nitrogen
____
gas and change it into _________.
ammonia
nitrogen
 This process is called _________
________.
fixation

ammonia
bacteria converts __________
nitrites and _______.
nitrates
into ________
Other
_________
Producers
use these to make
proteins and then consumers
_________ eat the
producers to use the nitrogen and
make their own protein.
Denitrification
When organisms die, ____________
decomposers return
nitrogen to the soil as ammonia.
_______
ammonia can be taken up by
 The ________
__________.
producers
nitrates into nitrogen
 Bacteria converts the _______
gas
denitrification
___ by ____________.
 Then nitrogen is released into the
atmosphere again.
___________

Levels of the Nitrogen Cycle