How did the oceans form? Detailed answer

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How did the oceans form? Detailed answer

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How did the oceans form?

In the history of the Earth, there are still many unsolved mysteries and mysteries. One of them is the question of how the oceans formed. In fact, we don't even know exactly when it happened. It seems, however, beyond doubt that they did not exist in the earliest period of the Earth's development. It is possible that in the beginning the ocean was a huge cloud of steam that turned into water as the surface of the Earth cooled.

According to scientists, based on information about the amount of mineral salts in the ocean, this happened from 500 to 000 years ago. Modern theories claim that at one time almost the entire surface of the planet was sea. Some areas of the Earth several times found themselves under the waves of the seas. However, it is not known whether this section of the ocean floor was land and vice versa.

There is ample evidence that, at one time or another, various parts of the land were covered by shallow seas. Most of the limestone, sandstone, and shale found on solid land are sedimentary rocks—deposits of mineral salts on the seafloor over millions of years. The most common chalk is a compressed cluster of shells of tiny creatures that once lived in the seas.

Today, the waves of the world's oceans cover almost three-quarters of the Earth's surface. Although there are still many regions in which man has not explored the ocean floor, we know approximately what its appearance is. It is not as diverse as the surface of the continents, however, it also has mountain ranges, plains and deep depressions.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Do raccoons wash their food?

In the 1920s, the word "raccoon" was immediately associated with a raccoon coat. At that time, wearing such a fur coat was very fashionable.

Raccoons are hunted today, of course, but they must be very glad that they have lost their former popularity.

The raccoon is a very brave fighter and has few more enemies besides the human. But if he gets to people while still very young, then he becomes a universal favorite. Animals live from Canada to Panama, except for the high Rocky Mountains.

The length of the animals ranges from 64 to 89 cm, and their weight can reach 11 kg. These mammals live in an area where there is water and trees necessary for their lair. They forage for their food at night - mainly crayfish, mollusks, fish and frogs, but they also eat nuts, berries, fruits and young corn.

The lair where raccoon cubs are born is a hollow in a tree trunk or branch. The female gives birth to cubs once a year, usually there are 4 or 5 of them. When the raccoon family has to move, the female transfers her cubs one by one to a new place. But by autumn they become large enough to start an independent life.

Do raccoons wash their food before eating? Sometimes yes, sometimes no. Most of them prefer to wash their food, and there have even been instances of raccoons throwing their food away if they couldn't find water.

But they don't wash their food to make it clean, because the water is often dirtier than the food itself. Rather, raccoons do not like the process of washing, but simply wet food.

Test your knowledge! Did you know...

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Invisibility film for transmitting secret messages 01.09.2016

Inspired by the camouflage abilities of squid and jellyfish, researchers at the University of Connecticut have created a material that can change color or texture in response to certain stimuli.

The scientists, who presented their findings at the 52nd National Meeting and Exhibition of the American Chemical Society (ASC), said they have replicated the properties of marine life tissues on a thin polymer film. Under the influence of moisture, it is deformed, changing its properties. The range of applications of this technology is huge, from creating an anti-reflective coating to encrypting secret messages.

It's all about wrinkling. Jellyfish can create wrinkles by turning their skin opaque to scare away predators. And not only them: when squids sense danger, their muscles contract sharply, exposing colored pigment, which often confuses the attacker.

The new "skin" consists of a thin film of polyvinyl alcohol, which is placed on a rubber base, which includes polydimethylsiloxane (PDMS). When wrinkled, it is opaque, but when exposed to moisture, the material expands and becomes transparent, allowing you to see the text hidden underneath. The researchers noted that if a film is made with very weak (or no) bonds between the polymer chains, then it becomes disposable, since it cannot recover after getting wet.

In addition to clandestine operations, the film can also find an everyday, very valuable use: it will allow for quality control of goods. So, for example, by placing such a film on the internal parts of a smartphone, it will be possible to monitor the conditions of their storage: if the phone has come into contact with water, it will be noticeable to the naked eye, which means it will protect you to some extent from buying defective equipment.

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