1. What is Nitrogen?
Where Can you find it?

2. Liquid Nitrogen

3. Nitrogen is used in…

4. THE NITROGEN CYCLE

5. But most importantly…

6. Two types of nitrogen: Fixed: Unfixed: Usable by plants
NOT usable by plants (found in the air and in living/dead organisms)

7. The Nitrogen Cycle Consists of two parts:
1-Nitrogen getting into the soil
2-Nitrogen changing into a form useable by plants

8. How does nitrogen get into the soil?
Nitrogen gets into the soil from waste from living organisms (feces/urine) in the form of ammonia, which is toxic to most living organisms

9. Most Important Idea
The process of changing nitrogen into a form useable by plants is called nitrogen fixation
Bacteria are the only organisms that can do nitrogen fixation
Denitrification converts nitrogen used by plants (nitrate) in the soil back to nitrogen gas in the atmosphere if there is too much in the soil

11. The Nitrogen Cycle

13. Carbon
Carbon is a major component of all organic compounds, including:
Carbohydrates,
Lipids
Proteins
Nucleic acids

14. Carbon
Is such a key ingredient of living tissue and ecosystems that life on Earth is often described as “Carbon based-life”

15. How the Carbon Cycle Works
CO2 is continousley exchanged between the atmosphere and oceans through chemical and physical processes.
Plants take in carbon dioxide during photosynthesis and use the carbon to build carbohydrates.
Carbohydrates then pass through food webs to consumers.

16. How the Carbon Cycle Works
Many animals combine carbon with calcium and oxygen that build skeletons of calcium carbonate.
Organisms release carbon in the form of carbon dioxide gas production.
When organisms die, decomposers break down the bodies, releasing carbon to the environment

17. How the Carbon Cycle Works
Geologic forces can turn accumulated carbon into carbon-containing rocks or fossil fuels
Carbon dioxide is released into the atmosphere by volcanic activity or by human activities, such as burning of fossil fuels and the clearing of burning of forest.

18. Question that we face
How much carbon moves through ach natural pathway?
How do human activities disrupt those pathways, and consequences does that disruption have?
How does burning fossil fuels affect atmospheric carbon dioxide?
How do ecosystems respond to such change?

20. 1.

21. 7. Which of the following would have the greatest affect on the amount of fixed nitrogen available in a grassland ecosystem?
A severe lightning storm
Planting several dozen legume plants
Air pollution
A large commercial farm

22. 9.

23. 10.