The territorial sea area of an ocean-going island can reach 1500 square kilometers. The United Nations Convention on the Law of the Sea stipulates that the islands in the middle of the ocean, natural islands, can maintain the natural existence of human beings, and can also have their own territorial sea and exclusive economic zone.
According to the provisions of the United Nations Convention on the Law of the Sea, offshore islands can be divided into territorial waters and exclusive economic zones: the territorial waters can reach 1500 square kilometers (12 nautical miles, 22 kilometers, radius squared multiplied by 3. 14), and the exclusive economic zone is 430,000 square kilometers.
Ocean, the earth science term, is the floorboard of the widest water body on the earth. The earth's surface is divided into huge interconnected water bodies by the mainland, which are called oceans. The central part of the ocean is called ocean, and the marginal part is called sea. They communicate with each other and form a unified water body.
The total ocean area on the earth is about 360 million square kilometers, accounting for 7 1% of the earth's surface area, with an average water depth of about 3795 meters. The ocean contains more than1350 million cubic kilometers of water, accounting for about 97% of the total water of the earth, and only 2% is available for human consumption.
The four oceans of the earth are the Pacific Ocean, the Atlantic Ocean, the Indian Ocean and the Arctic Ocean, and most of them are bounded by land and seabed topographic lines. Today, only 5% of the seabed has been explored, and 95% of the seabed is unknown.
The causes of ocean formation
Studies have proved that some large and small nebulae were separated from the solar nebula about 5 billion years ago. They revolve around the sun while rotating. In the process of movement, they collided with each other, and some lumps combined with each other, from small to large, and gradually became the original earth.
During the collision of nebula clusters, they shrink sharply under the action of gravity, and the radioactive elements in them degenerate, which makes the primitive earth heat up continuously. When the internal temperature reaches high enough, underground substances, including iron and nickel, begin to melt. Under the action of gravity, the weight sinks and tends to concentrate to the center of the earth, forming the core.
Lighter ones float to form the crust and mantle. At high temperature, the water inside evaporates, rushes out with the gas and rises into the air. But because of gravity, they will not run away, but will only turn around the earth and become a circle of air and water.