1. The Nitrogen Cycle

2. 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 _________________ ____________.
Sentence: Decomposers use decomposition to breakdown organic matter.

3. You have 30 seconds to share your responses
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

4. 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 _______________

5. You have 30 seconds to share your responses
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

6. 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.

7. You have 30 seconds to share your responses
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

8. Nitrogen Requirements
All organisms require ________ to make amino acids that build ________.
Many different forms of _________ occur naturally in the __________.
Nitrogen ____ (N2) makes up ___% of the ___________.
proteins
nitrogen
biosphere 78
gas
atmosphere

9. Nitrogen locations outside the atmosphere
Ammonia
___________ (NH3), and other ions are in animal ________ and in _____ or ________ organic matter.
Nitrogen also is in the ______ and other large bodies of ______.
Humans add _______ to the _________ when they apply plant ________.
wastes
dead
decaying
ocean
water
nitrogen
biosphere
fertilizer

10. Nitrogen Fixation
________ that live in ____ or on plant ____ (legumes) use forms of nitrogen ____ and change it into _________.
This process is called _________ ________.
Bacteria
soil
roots
gas
ammonia
nitrogen
fixation

11. Other bacteria converts __________ into ________ and _______.
ammonia
Other bacteria converts __________ into ________ and _______.
_________ use these to make proteins and then _________ eat the producers to use the nitrogen and make their own protein.
nitrites
nitrates
Producers
consumers

12. Denitrification
When organisms die, ____________ return _______ to the soil as ammonia.
The ________ can be taken up by __________.
Bacteria converts the _______ into nitrogen ___ by ____________.
Then nitrogen is released into the ___________ again.
decomposers
nitrogen
ammonia
producers
nitrates
gas
denitrification
atmosphere

15. Levels of the Nitrogen Cycle