All the information about the sea, information about the sea

There is a first-hand song "O Sea! Hometown! 》

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1. The ocean is the general name of the most extensive water body on the earth, the central part of the ocean is called the ocean, and the marginal part is called the sea, which communicates with each other to form a unified water body.

2. The earth's surface is divided by major landmasses into vast waters that communicate with each other called oceans, with a total area of about 100 million square kilometers, accounting for about 71% of the earth's surface area, and an average water depth of about 3,795 meters. The oceans contain more than 1.35 billion cubic kilometres of water, about 97 per cent of the planet's total water, and only 2 per cent of it is available for human consumption. The four main oceans of the earth are the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, and the Arctic Ocean, most of which are bounded by land and submarine topography.

So far, only 5% of the seabed has been explored, and 95% of the sea is unknown.

3. 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.

4. Under the action of gravity, the heavy sinking and tending to the center of the earth to concentrate to form the core; The lighter ones rise to form the earth's crust and mantle. At high temperatures, the moisture inside vaporizes and rushes out with the gas, flying into the sky of the forest potato. 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.

5. 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 wrinkled 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.

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

7. For a long period of time, the water vapor in the sky and the atmosphere coexisted, and the sky was dense with dense clouds. 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 hundreds of years.

The surging floods, through thousands of rivers, converge into a huge body of water, which is the primordial ocean.

1. The sea (English: seyt and ockjuukus; the ocean；The Sea in French.

mer) i.e. the ocean. In fact, there are still some differences between the sea and the ocean. Distinction between sea and ocean:

The vast ocean, from azure to turquoise, is beautiful and spectacular. The sea, at the edge of the ocean, is an appendage of the ocean. The sea covers about 11% of the ocean, and the water depth of the sea is relatively shallow, with an average depth of several meters to two or three thousand meters.

The sea is close to the mainland, and the temperature, salinity, color and transparency of the sea are affected by the land, and there are obvious changes in the temperature, salinity, color and transparency of the sea.

2. The sea is at the edge of the ocean and is an accessory part of the ocean. The sea covers about 11% of the ocean, and the water depth of the sea is relatively shallow, with an average depth of several meters to two or three thousand meters. The sea is close to the mainland, and the temperature, salinity, color and transparency of the sea are affected by the land, and there are obvious changes in the temperature, salinity, color and transparency of the sea.

It is the central part of the ocean and the main body of the ocean. The total area of the world's oceans accounts for about 89% of the ocean area. The water depth of the ocean is generally more than 3,000 meters, and the deepest depth can reach more than 10,000 meters.

The ocean is far away from the land and is not affected by the land. Its moisture and salinity do not vary much, and each ocean has its own unique current and tide system. The water of the ocean is blue in color, with great transparency, and there are very few impurities in the water.

3. There are five oceans in the world, namely the Pacific Ocean and the Indian Ocean.

Atlantic Ocean, Arctic Ocean.

Southern Ocean. The Pacific Ocean is the largest and the Arctic Ocean is the smallest.

4. In summer, the sea water warms and the water temperature decreases in winter; In some areas, the sea water is still frozen. In places where large rivers flow into the sea, or during rainy seasons, the sea becomes lighter. Due to the influence of land, the river carries sediment into the sea, and the coastal sea water is turbid, and the transparency of the sea water is poor.

The sea does not have its own independent tides and currents. The sea can be divided into marginal seas, inland seas, and the Mediterranean Sea.

The marginal sea is both the edge of the ocean and the frontier near the continent; This type of sea is widely connected to the ocean, usually separated from the ocean by a group of islands. The East China Sea and the South China Sea are the marginal seas of the Pacific Ocean. Inland seas, i.e., seas located within continents, such as the Baltic Sea in Europe.

Wait. The middle sea is a sea between several continents, and the water depth is generally deeper than that of the inland sea. The world's main seas are close to 60. The Pacific Ocean is the most numerous, followed by the Atlantic Ocean, and the Indian Ocean is about the same as the Arctic Ocean.

The deepest part of the ocean is the Mariana Trench in the Pacific Ocean, with a maximum depth of 11,521 meters (according to the data of "Geographical Knowledge 1977 Issue 8"), and the average depth is: Pacific Ocean 4,282 meters Atlantic Ocean 3,627 meters Indian Ocean 3,897 meters Arctic Ocean 1,200 meters The ocean is closely related to the origin of life, and the evolution of life is inseparable from the ocean. Today, the survival and development of human beings are inseparable from the ocean.

The Earth is insignificant as a planet in the vastness of the universe, but it has a unique feature that eclipses most of the celestial bodies in the universe: it is the only galaxy in the solar system that has a large amount of liquid water. If you take a space shuttle and look down at the Earth, you will clearly see that the inhabited Earth is a pale blue ball of water, and the land is nothing more than islands in the vast ocean. In this sense, it seems more appropriate to call the Earth a ball of water or an ocean ball.

The surface area of the earth is 100 million square kilometers, of which the area of the ocean is 100 million square kilometers, accounting for the entire surface area of the earth; The land area is 100 million square kilometers, which only occupies the entire surface area of the earth. The ocean has a huge impact on the natural world and the progress of human civilization and society, and the historical process of human social development has always been closely related to the ocean. There is no one who does not believe that human civilization and progress directly benefit from the oceans.

The ocean is the cradle of life, which provides conditions for the birth, evolution and reproduction of life. The ocean is home to wind and rain, and it plays an important role in controlling and regulating the global climate. The ocean is the protection of resources, it provides people with abundant food and endless resources; The ocean is the main road of transportation, which provides an economical and convenient transportation route for human beings to engage in maritime transportation; The ocean is a base for modern high-tech research and development, which provides space for people to explore the mysteries of nature and develop high-tech industries. Today, as mankind enters the 21st century, the ocean, as a special space on the earth, is far beyond people's original understanding in terms of its material resource value and political and economic value. People's needs for the ocean are no longer just for the benefit of fishermen and boats.

The rapid development of science and technology has enabled mankind to march towards the ocean in a marching attitude. However, no one can deny that the deterioration of the global environment and the abnormal development of the economy in the 20 th century have cast the shadow of the energy, food and water crises over people's heads. The land is overwhelmed, and the ocean has the potential to be a second living space for humanity.

But don't forget, we only have one Earth, and there is only one handful of sea water on Earth. How important the clean and bright sea is to us human beings and to all living beings on the earth! Let's remember what a Tetsuri once said:

The ocean has nurtured us, and we have it to thank us. As the offspring of the original cradle of life, our smooth **, the blood in our veins, and the water circulating in our bodies are all owned by the ocean, and we are only a part of the ocean.

He and his daughter are the most painful for you to assault, and he is working for the new characters in the Forbidden City