Water is one of the most valuable substances on Earth, since the life of the vast majority of creatures depends on it. Also, every person knows how this liquid murmurs when it is in a restless state. Presenting this sound is not difficult, but why does it appear?
Where did the water on Earth come from?
Until now, scientists cannot explain where water came from on Earth, and in such large quantities. While no liquid is observed on the other planets, some of their satellites contain it in large quantities.
The most common hypothesis about the appearance of water on Earth is its cometary origin. In the Kuiper belt, located beyond the orbit of Neptune, there are many asteroids containing a liquid identical to the earth. Billions of years ago, some of them could go beyond the belt and fly into the solar system, where they collided with a third planet. However, this theory has not yet been confirmed.
Interesting fact: in 2017, geophysicists put forward a new hypothesis that water could appear on the surface of the Earth due to chemical reactions that occur in its bowels.
Why does the water murmur
Water makes any sounds due to the formation of bubbles of various sizes within itself. When the fluid is in motion, its surface changes in every way, and waves appear. Between them are air molecules that penetrate inside, forming a bubble. Due to the continuous dynamics of movement and light weight, they immediately rush up.And when the bubble comes to the surface, it bursts with a characteristic sound.
With a strong current of such pops, thousands, or even millions, occur in an instant. All of them merge into a single sound, which is accepted by a person for murmur. This is most noticeable in boiling water. If you fill the pan and put it on fire, then the water will not make any sounds at first, but with the appearance of the first bubbles, you will hear bubbling. At streams, murmur is heard in places where water collides with an obstacle or forms waves on the surface - there also appear and burst bubbles.
When water flows, millions of bubbles begin to form and burst in them. This sound is murmur. In fact, it is not the water that makes a noise, but the billions of molecules of air that get inside and tend to the surface.
