455lec2 - This all adds up to a really dynamic planet that is well adapted for life Atmospheric Stratification and Important Types of Radiation and

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This all adds up to a really dynamic planet…………
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Note the density stratification with regard to the gases (lightest farthest out, heaviest closer to Earth surface). Also note that vertical scale is logarithmic. Atmospheric Stratification and Important Types of Radiation and Radiation Shields. ………that is well adapted for life
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Fig. 6.15 The Global Chemostat. This diagram shows the important flows for two elements, O and C (though not reduced C). Other important elements, such as N, P, S, Na, Ca, and K follow similar cycles. (Chemostat = hold chemistry constant or change slowly). Start analyzing the cycle with the algae (as prime movers) and follow the chain. Algae actually started the chemostat over 4 Bya. This chemostat is one of the hallmarks of a planet with advanced life forms and it probably very rare in the universe.
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Fig. 6.16 The global thermostat . Shallow water is heated by the sun to form the Earth’s most important heat reservoir. The photic zone above the thermocline is the habitat of algae and phytoplankton which from the base of the aquatic food chain. Below the thermocline the water is cooler and less agitated, hence less oxygenated. These waters may even become stagnant and reducing. When they do they constitute the first step in the preservation of organic matter, which eventually leads to gas and oil deposits.
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Dynamic nature as seen by many “cycles” These cycles all play essential roles in “regulating” the environment: Chemically Physically By maintaining parameters near levels that are beneficial to living organisms These parameters do change thru time but they usu change gradually enough so that life can evolve and adapt
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The Geologic Cycle Over the last 4.6 billion years rocks and
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This note was uploaded on 11/10/2011 for the course GEOL 455 taught by Professor Perfect during the Fall '11 term at University of Tennessee.

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455lec2 - This all adds up to a really dynamic planet that is well adapted for life Atmospheric Stratification and Important Types of Radiation and

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