As we all know, more than 70% of the earth is ocean. Although we human beings have always felt that we have a large part of the area, it is still insignificant in general, and water has always been regarded as the source of life. Later scientists also found the macromolecule on the earth, the breeding place of which is the sea, so people have been keen to develop the ocean, because they try to find new life in the ocean, but the small group thinks that the first thing to consider is whether there is water, which is a crucial issue.
At the time of the birth of the earth, water already existed, but the environment was not very good at that time, so most of the water was not on the surface as it is now, but under the surface. Later, the earth surface was covered by lava. Therefore, the underground water began to gush out continuously, and then it experienced a long time of transformation, and the earth was slowly covered by the sea And the situation has been improving slowly. The ecological environment is relatively good. We human beings have been living happily in this water polo.
Second, scientists believe that water is transported thousands of miles from asteroids. Billions of years ago, there were many floating planets in the universe, most of them ice crystals. When asteroids collide with the earth, water molecules gradually fall on the surface of the earth. Over time, billions of years later, the earth has gradually gathered mountains and oceans, and finally ushered in human beings.
Finally, scientists believe that the water on earth may be blown by the solar wind. Because when the sun is undergoing serious nuclear fusion, it will take away a lot of hydrogen elements, and there are many oxygen elements on the earth. The students with good chemistry course may associate the two elements with their products water in a moment, so the Earth naturally will also Water is produced.
What is the point that we prefer?