The Earth's Atmosphere

The nimbus         Soon afterwards its formation (about 4,500 million eld ago) background may return resembled present day Jupiter or superstar of the other giant planets, with a thick degree of gases contact a very dense core. In a propose of the cosmic gases a secondary tune developed, derivation from the nation itself. For many millions of years after its formation, the earths go up was in all probability molten and, even after a thin outermost novelty had solidified, there was incessant volcanic action. During this period of neat activity, the rocks gave remove large quantities of gases, including nitrogen, ammonia, carbon monoxide and water system vapor as well- a mixture similar to that given moody by volcanoes and fumaroles today. corresponding ultramodern volcanic gases, the primeval melodic line is sentiment to confound contained only the slightest trace of atomic reduce 8, and so it would have been poisonous to near all mode rn life forms. Oxygen and Photosynthesis The earth gradually cooled, and after its surface temperature had fallen to below 212 degrees F. (100 degrees C), water vapor in the atmosphere condensed and fell as rain, which filled hollows and created shallow lakes and seas. In these waters, at depths of more than 33 feet (10 meters), the limit of penetration by lethal ultraviolet radiation, the first primitive plants evolved. They produced their own food for thought by photosynthesis (a form of metabolism in which light is apply to convert inorganic molecules such as carbon dioxide and water into more complex organic molecules, such as sugar), and released atomic number 8 into the atmosphere.

        In the air molecules of oxygen were broken down by ultraviolet radiation into single atoms, and some of these atoms combined with oxygen molecules to form ozone. Ozone is an unstable gas, the molecules of which absorb ultraviolet radiation.          The Modern Atmosphere The straits gases in... Not sure where you got your information, howerver the earth is quite ripened than 4.5 million years old. They have found fossils older than that in Africa resently. I am pretty sure your instructor would have got that info thusly not rating you with a 4.0. maybe 4.6 billion years. hold this gov site. http://www.newton.dep.anl.gov/askasci/gen99/gen991 68.htm If you want to get a replete(p) essay, aver it on our website: OrderCustomPaper.com

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