002 Environmental Systems

Water:    • Water: A Polar Molecule  
pH:    • pH and Buffers  
Biological Molecules:    • Biological Molecules  

In this video Paul Andersen explains how matter and energy are conserved within the Earth's system. Matter is a closed system and Energy is open to the surroundings. In natural systems steady state is maintained through feedback loops but can be be affected by human society.

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Music Attribution

Intro
Title: I4dsong_loop_main.wav
Artist: CosmicD
Link to sound: http://www.freesound.org/people/Cosmi...
Creative Commons Atribution License

Outro
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/trac...

All of the images are licensed under creative commons and public domain licensing:

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MODIS, NASA images by Reto Stöckli, based on data from NASA and NOAA Instrument: Terra. Polski: Mozaika Zdjęć Półkuli Zachodniej, Zrzutowana Na Sferę I Poddana Obróbce., October 2, 2007. Earth Observatory: Twin Blue Marbles. https://commons.wikimedia.org/wiki/Fi....
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Producercunningham, NASA Collage by. English: A Comparison of the Aral Sea in 1989 (left) and 2014 (right)., September 30, 2014. 1989: aral sea 1989 250m File:Aralsea tmo 2014231 lrg.jpg. https://commons.wikimedia.org/wiki/Fi....
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Wikipedia, The original uploader was Adz at English. Daintree Rainforest. Photo Taken June 2005. Uploaded with Permission., August 13, 2005. Transferred from en.wikipedia to Commons. https://commons.wikimedia.org/wiki/Fi....