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The Principle Events in the Evolution of the Earth's Atmosphere The literal translation of the word atmosphere is "sphere of vapors". The Earth's atmosphere is a protective sphere of vapors, or air that surrounds the Earth and provides it with a layer of insulation from the harmful rays of the sun. It is a vital part of the Earth, and has changed dramatically since the beginning of time. The earth's atmosphere has gradually changed since …

…from the harmful radiation from the sun. In conclusion, the Earth’s atmosphere has changed dramatically since the Earth’s origin about 4.6 billion years ago. There are many factors that contributed to this change over time. By getting a better understanding of our Earth’s atmosphere we can use in many useful ways. We can use this knowledge of the atmosphere for a worthy cause in many areas of science and greatly benefit from it.