The Principle Events in the Evolution of the Earth The Principle Events in the Evolution of the Earths Atmo scope The literal translation of the word line is sphere of vapors. The Earths atmosphere is a protective sphere of vapors, or air that surrounds the Earth and provides it with a layer of separation from the harmful rays of the sun. It is a vital part of the Earth, and has changed dramatically since the ascendant of time. The earths atmosphere has gradually changed since the Earths birth approximately 4.6 million geezerhood ago. In the beginning, the Earths composition was very different that how it exists today.
A yearn time ago the Earths atmosphere was very similar to todays genus Venus and Mars atmosphere. It had about 95% carbon dioxide, 2-3% nitrogen, and very little, less than 1% oxygen. Today the Earth contains 79% nitrogen, 21% oxygen, and 3% water supply vapor. It is evident that there were many events that happened over billions of years that accommodate contribute...If you want to get a full essay, order it on our website:
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