earth science/biology standard
DESCRIPTION
Earth Science/Biology Standard 7a. Students know the carbon cycle of photosynthesis and respiration and the nitrogen cycle. What is nitrogen?. Chemical element N, atomic number=7 Colorless, odorless, tasteless, inert gas Makes up 78% of the atmosphere N 2 ,Dinitrogen gas, (Diatomic ) . - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/1.jpg)
![Page 2: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/2.jpg)
Earth Science/Biology Standard
7a. Students know the carbon cycle of photosynthesis and respiration and the nitrogen cycle.
![Page 3: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/3.jpg)
What is nitrogen? Chemical element N, atomic number=7
Colorless, odorless, tasteless, inert gas
Makes up 78% of the atmosphere
N2,Dinitrogen gas, (Diatomic )
![Page 4: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/4.jpg)
Why is it important? Proteins and nucleic acids (DNA, RNA)
in living organisms
Nitrogen gas (N2)-> cannot be used directly.
* Animals get nitrogen from plants or animals that ate plants
![Page 5: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/5.jpg)
Forms of nitrogen Atmospheric Nitrogen: N2
Nitrate :NO3
Nitrite: NO2
Ammonia: NH4
![Page 6: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/6.jpg)
What is the nitrogen cycle?•The process by which nitrogen is converted between its chemical forms
•It can be carried out by both biological and non-biological processes
•Bacteria are key element of the cycle
![Page 7: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/7.jpg)
Where does it go?
• MicrobesMicrobes
![Page 8: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/8.jpg)
Nitrogen fixationbreak apart N2 Atmospheric: lightning Biological: bacteria
Industrial: great pressure and temperature
![Page 9: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/9.jpg)
Atmospheric Nitrogen and Nitrogen Fixation
Triple bond is very stable Nitrogen gas- ammoniaMainly through bacteria
![Page 10: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/10.jpg)
Bacteria•Single celled
•Very small, microscopic
![Page 11: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/11.jpg)
Nitrogen fixing bacteria
Bacteria living in root nodules of LEGUMES (soybeans, peanuts, alfalfa)
Bacteria living in soil and water
![Page 12: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/12.jpg)
Assimilation Plants Nitrate->nitrite-> ammonium-> amino
acids, nucleic acids Ammonium-> amino acids, nucleic acids
(in legumes)
Animals eat plants amino acids, nucleotides
![Page 13: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/13.jpg)
Mineralization (ammonification) Plant or animal dies, animal excretes
waste
Bacteria convert organic nitrogen to ammonium
![Page 14: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/14.jpg)
Nitrification Bacteria convert ammonium to nitrate nitrite-> nitrate->ammonium Nitrate-> ammonium
Can seep into groundwater Health problems Environmental problems
![Page 15: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/15.jpg)
Denitrification Bacteria convert Nitrate to Nitrogen
gas
Completes the cycle by returning nitrogen to the atmosphere
![Page 16: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/16.jpg)
Increased Nitrogen emissions Cultivation of legumes
Artificial fixation of nitrogen
Nitrogen oxide from cars and factories(greenhouse gas, destroys ozone layer)
![Page 17: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/17.jpg)
In water… Acidification
EutrophicationToo much nitrogen in the water (mostly
due to runoff from land) -> more algae (algal blooms) -> take up oxygen-> affects other organisms (animal lives die)
![Page 18: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/18.jpg)
![Page 19: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/19.jpg)
Earth Science/Biology Standards
7c. Students know the movement of matter among reservoirs is driven by Earth's internal and external sources of energy
![Page 20: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/20.jpg)
What powers the water cycle?
![Page 21: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/21.jpg)
What drives photosynthesis?(Carbon transfer: atmosphere->biomass)
![Page 22: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/22.jpg)
The sun!
![Page 23: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/23.jpg)
What type of energy is produced during cellular respiration and *decomposition?
![Page 24: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/24.jpg)
What powers subduction zones?Energy transfer between hot interior and cool exterior
![Page 25: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/25.jpg)
How?
![Page 26: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/26.jpg)
Convectionmovement of molecules in liquids and gases, “flowing”
![Page 27: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/27.jpg)
Coal Formation?Plants that died millions of years ago*Pressure by sedimentary rocks
![Page 28: Earth Science/Biology Standard](https://reader033.vdocuments.site/reader033/viewer/2022051821/5681611c550346895dd07624/html5/thumbnails/28.jpg)
videohttp://video.google.com/videoplay?docid=-7538120906762340500#