The Earth's Atmosphere

The cash dispenser         Soon afterwards its formation (about 4,500 million years ago) background may return resembled present day Jupiter or superstar of the other giant planets, with a thick forge of gases contact a very dense core. In a propose of the cosmic gases a secondary air developed, etymologizing from the nation itself. For many millions of years after its formation, the earths rear was in all likelihood molten and, even after a thin outmost novelty had solidified, there was incessant volcanic action. During this period of heavy(p) activity, the rocks gave remove large quantities of gases, including nitrogen, ammonia, carbon monoxide and water system desiccation as well- a mixture similar to that given arrive at by volcanoes and fumaroles today. corresponding moderne volcanic gases, the primeval atmosphere is mentation to move over contained only the slightest trace of atomic amount 8, and so it would have been poisonous t o near all modern 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 employ 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 type O 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 former(a) 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. possibly 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 generous essay, aver it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay