The mankind was always predisposed to knowledge something new or the sacramental, covered with thick layers past times. Even in the elementary processes surrounding us we could notice a certain mysterious note which solution is capable to shed light on immense curiosity. Such trend is widespread everywhere including on a question about origin of the atmosphere on our planet without which life, in its original look, simply could not exist.
Instruction
1. As it became known, the oxygen type of our terrestrial atmosphere arose thanks to activity of vegetable organisms, by simple physical and chemical reactions. About 2.8 billion years ago oxygen content in the atmosphere reached a point of 1% of modern indicators. However, excess the content of gas began to be observed only more than 1.4 billion years ago.
2. This fact was affected accruing, on scales, by formation of krasnotsvetny granite. In the Cambrian Period, namely 550 million years ago, in thicknesses of water the most difficult multicellular organisms with existence of an external skeleton began to arise. It helped to increase oxygen level in the atmosphere to 10% of present contents.
3. Rapid hanging of percentage of oxygen in the atmosphere of the planet Earth is the share of a turn of times – about 400 million years ago. It contributed to the rapid development of a large number of types of plants. As we know, plants, directly, participate in formation of oxygen. However scientists cannot still give the exact answer to a question why for 150 million years prior to this event, the amount of oxygen in the atmosphere of the planet could increase to 10 times! Perhaps, we experts will be able sometime to open a veil of this secret.
4. However modern scientists do not stop making hypotheses, concerning the above-stated question. So, the employees of Institute of the Siberian Branch of the Russian Academy of Science (specializing in studying features of earth crust) put forward the theory. According to it, also existence of the alternative sources influencing production of oxygen was not excluded. Rapid growth of a granite stone influenced release of charcoal and carbonic gases and also – waters. Under this influence, earth crust increased acidity level that affected enrichment of the atmosphere with oxygen.