The action of gravity and solar radiation together give the planet a constant process, which is called the "water cycle on Earth", which is a kind of engine of life. If it ever stops, then all living things will die. This moisture cycle is usually divided into three main types. The intracontinental circulation is characteristic only for a certain part of the land. A small cycle occurs when moisture evaporates from the ocean and returns to the water as rain. All processes occur in the hydrosphere and atmosphere, clouds and clouds are not blown away by the wind. And a large water cycle is due to evaporation and the formation of clouds. But unlike previous moisture cycles, in this case, the clouds can be blown away from the place of initial evaporation.
It so happened that the water in the ocean is not suitable for drinking, because it contains a large amount of s alt. If it went through the water cycle on Earth in its pure form, then all the continents would fill the desert. However, nature decreed otherwise. Despite the high concentration of s alt directly inocean, moisture returns to the surface of the planet in precipitation already in a desalinated form. It happens in the following way. Every second, moisture evaporates from the surface of water sources, be it a small lake or the world ocean, under the influence of solar heat. If we consider a small area of \u200b\u200bthe reservoir, then one or more drops rising into the upper air layers are taken into account. However, given that there is less land on the planet, every second a huge mass of water rises into the atmosphere. Part of it goes beyond the Earth. In the troposphere and stratosphere, water is converted into rain clouds, and the wind carries them around the ball of our planet. Then precipitation falls on the continents in the form of snow, rain, hail and others. So, every day we observe the water cycle on Earth, this eternal process, the beginning of which is equivalent to the appearance of our planet.
However, not all moisture from the surface of the ocean falls as precipitation. Sometimes evaporation is so strong that drops of water do not leave the earth's surface, but remain on it in the form of fog. Then we observe a mixed water cycle in nature. Its scheme is as follows. Water begins to rise from the surface, but its drops are not the same. Smaller and lighter ones pass into the atmosphere, while heavier ones remain in the hydrosphere and safely return to the ocean. The first drops are transformed into clouds or clouds, which travel around the planet under the influence of the wind. These, as a rule, pour out already directly on the continents. Precipitation contributes to the filling of water bodies on land, and they alsopenetrate the earth's surface, where they form groundwater. From the continents, moisture returns to the ocean again: rivers carry it there.
It is impossible, mentioning the water cycle on Earth, not to mention those drops that move in space. While our planet is in its orbit, the side that is closer to the Sun loses a piece of its atmosphere, then, when it turns away from the star, it restores it. Together with the atmospheric layer, the water droplets that are in it are also lost. They transform into ice crystals and settle like a kind of dew on cosmic dust. Being completely transparent and very small, they kept their existence a secret for a long time. And only recently, scientists still managed to find them. Surely this water also plays a role, but not on a planetary scale, but on a universal scale. However, we do not know exactly this side of the water cycle.
