How is the sea made?????

Studies have proved that about 5 billion years ago, some large and small nebulae were separated from the solar nebula. They rotate while revolving around the sun.

In the process of movement, they collide with each other, and some clumps combine with each other, from small to large, and gradually become the primitive earth. During the collision of nebula masses, the sharp contraction under the action of gravity, coupled with the transformation of the internal radioactive elements, caused the primitive earth to be continuously heated and warmed. When the internal temperature reaches a high enough level, the substances in the earth, including iron, nickel, etc., begin to melt. Under the action of gravity, the weight sinks and tends to concentrate on the center of the earth, forming the earth's core; The lighter ones rise to form the earth's crust and mantle.

At high temperatures, the moisture inside vaporizes and rushes out along with the gases and soars into the air. But due to the gravitational pull of the center of the earth, they will not run away, and only around the earth, becoming a circle of air and water.

A layer of crust located on the surface of the earth, in the process of cooling and condensation, is constantly impacted and squeezed by the violent movement of the earth's interior, so it becomes folded and uneven, and sometimes it is squeezed out, forming ** and volcanic eruptions, spewing out magma and hot gas. At first, this happened frequently, but gradually became less and less common and slowly stabilized. This process of differentiation of light and heavy materials, resulting in great turmoil and great reorganization, was completed about 4.5 billion years ago.

After the earth's crust has been cooled and shaped, the earth is like a long-left and dried apple, with a wrinkled and uneven surface. Mountains, plains, river beds, sea basins, all kinds of terrain are available.

Ocean formation. For a long time, the sky was full of water vapor and the atmosphere, and the sky was dark and dark. As the earth's crust cools and the temperature of the atmosphere slowly decreases, the water vapor condenses with dust and ash and becomes water droplets.

Due to uneven cooling, the air convection is violent, forming thunder and lightning winds, torrential rain and turbidity, and the rain is getting heavier and heavier, and it has been raining for a long, long time. The surging floods, through thousands of rivers, converge into a huge body of water, which is the primordial ocean.

In the pristine ocean, the sea water is not salty, but acidic and hypoxic. The water evaporates and rains back to the ground, dissolving the salt from the rocks on land and the seabed and collecting them in the seawater. After hundreds of millions of years of accumulation and fusion, it has become a roughly uniform salty water.

At the same time, because there was no oxygen in the atmosphere at that time, and there was no ozone layer, ultraviolet rays could reach the ground, and with the protection of seawater, life was born in the ocean. About 3.8 billion years ago, organic matter was created in the oceans, and there were lower single-celled organisms. In the Paleozoic Era, 600 million years ago, there were seaweeds, which photosynthesized in sunlight and produced oxygen, which slowly accumulated and formed the ozone layer.

At this point, creatures began to land on land.

In short, through the gradual increase in water volume and salinity, and the vicissitudes of geological history, the primordial ocean gradually evolved into the ocean it is today.

The sea was formed a long, long time ago by the accumulation of a lot of rain on the ground. About 4.6 billion years ago, there were only seas of hot magma on Earth, and the sky was shrouded in water vapor and carbon dioxide. Later, the temperature of the earth's surface gradually began to drop, and water vapor turned into clouds and rained.

Rain further lowers the surface temperature, and when the temperature drops, new rain falls, and so on. It was able to form the sea, and it can be imagined that there was a lot of rain at that time. The sea that was formed at that time contained almost all the elements on earth, such as iron, aluminum, and sodium, was as salty as the sea is today.

Praise.

1. The blue sea.

2. The surging sea.

3. Calm sea.

4. The blue sea.

5. Tranquil sea.

6. Beautiful sea.

7. The wide sea.

8. The vast sea.

9. The rough sea.

10. The magnificent sea.

11. The vast and boundless sea.

Extended Information: 1. Azure [ wèi lán ] Basic Definition: Like the color of a clear sky.

二、澎湃 [ péng pài ].

Basic definition: 1. Describe the waves hitting each other.

2. The metaphor is majestic and majestic.

3. Calm chain dry [ píng jìng ].

Basic Definition: (mood, environment, etc.) No uneasiness or turmoil.

Fourth, 恬静shed 野洞 [ tián jìng ] Basic Definition: Quiet; Serenity.

Summary. 1. Blue sea 2, surging sea 3, calm sea 4, blue sea 5, quiet sea 6, wide sea.

1. Blue sea 2, surging sea 3, calm sea 4, blue sea 5, quiet sea 6, wide sea.

Example sentence: 1 The earth is like the blue sea, and we are just a drop of water from the Naga Bridge into the sea. 2.I looked at the blue sea and couldn't help humming a song, and my mood was as light and brisk as a sailboat speeding against the sea breeze.

Summary. Kiss, 1 blue sea; 2. The surging sea. 3. Calm sea. 4. The blue sea. 5. Tranquil sea. 6. Beautiful sea.

Kiss, quietly regret the rough 1 blue front scum sea; 2. The surging sea. 3. Calm sea. 4. The blue sea. 5. The sea of tranquility and enlightenment; 6. Beautiful sea.

7. The wide sea. 8. The vast sea. 9. The rough sea. 10. The magnificent sea.

Hello , what you might want to ask is "what kind of sea"? Here are a few examples of "what kind of sea" are common:- The sea in spring:

Warm, clear and blue. - The sea in summer: welcoming, glorious, lively, noisy.

The sea in autumn: calm, heavy, and empty. - The sea in winter:

Cold, desolate, desolate, mysterious. Of course, this is only an expression of some experience and sensibility, and it is not a strict scientific definition. In fact, the state and characteristics of the ocean are influenced by many factors, such as season, climate, geographical location, depth of water and branches, wave shape and water temperature, and so on.

Summary. 4. Tranquil sea; 5. Beautiful sea; 6. Wide sea; 7. The vast sea;

Hello! I'm glad to be able to answer for you The answers to the sea are as follows: 1. Blue sea 2. Surging sea 3. Calm sea.

4. Tranquil sea; 5. Beautiful sea; 6. Wide sea; 7. The vast sea;

1."of" is usually followed by a pronoun or noun. For example: beautiful campus "is the noun beautiful her she" is the pronoun.

2."Withstanding" can be preceded by an adjective, a noun, a pronoun. For example, "beautiful campus, beautiful" is the adjective Lu Xun's article, Lu Xun "is the noun, our family, we" is Dai Changhuichun's words.

Summary. 1.The endless sea, the endless sea, the choppy sea, the magnificent sea, the turbulent sea.

2.一望無組 [yīwàngwújì] means: you can't see the edge at a glance.

3.The description is very vast. 4.

From the sixty-fourth chapter of Wu Chengen's "Journey to the West" in the Ming Dynasty, you can take a look at Ha Qinqin.

1.A rushing endless sea, an endless sea, a rough sea, a magnificent sea, a surging sea. 2.

一望無組 [yīwàngwújì] means: you can't see the edge at a glance. 3.

The description is very vast. 4.From the sixty-fourth chapter of Wu Chengen's "Journey to the West" of the Ming Sanliang Mo Dynasty, you can take a look at Ha Qinqin.

The main knowledge points examined in this question are: the use of the four operations and the ability to mathematically turn abstraction into concreteness. and the use of mathematics in a practical context. Overall, Bi Ru said that returning the hand to the hand is a relatively simple question