The facts may be unknown to you about the oceans

The ocean is not only home to thousands of different kinds of marine animals that are hidden in many mysteries that make people want to explore and explore. So what do you know about the ocean? Let's learn some interesting things to build up our own knowledge base on this field.

First, let's take a look at some of the basic geological information of the ocean:

- The ocean area accounts for 71% of the earth's surface (about 362,000,000 km ² ) and contains 97% of the earth's total water volume.

- Average depth: 12,200 feet (3,720m). The deepest point of the ocean is about 36,198 feet (11,033m) located in Mariana in the western Pacific Ocean.

- Mountain ranges formed along the oceans about 40,000 miles (equivalent to 64,000km). The highest mountain is Mauna Kea, Hawaii, and their elevation ranges from 33,474 feet (10.203m) from the ocean floor and is 13,680 feet (4,170m) from the sea.

Information you may not know about living organisms that exist in the ocean:

- The ocean provides 99% of the living space for living organisms in saltwater environments. In which more than 90% of this habitat exists in deep waters called abyss.

- The Antarctic ice sheets formed and dissolved on the ocean every year almost twice the size of the United States.

- Water pressure at the deepest point in the ocean is about 8 tons per square inch, which is equivalent to a person trying to keep 50 large jets.

- The world's oceans contain nearly 20 million tons of gold.

- The average temperature of the oceans is 2ºC, about 39ºF.

- 80% of the pollution that affects the sea and the ocean comes from land activities.

- The cost of the global economy on death and disease from contaminated coastal waters is about $ 12.8 billion a year. In which the effect of hepatitis when eating contaminated seafood is about $ 7,200,000. In addition, land-based pollution can kill up to 1 million seabirds, 100,000 mammals and thousands of tons of fish each year.

- There are about 4,000 coral reefs worldwide, but the remaining 60% are likely to disappear within the next 3 decades. The main causes of the decline of coral reefs come from the destructive fishing of humans, pollution from land-based waste, large amounts of tourism exploitation and surface warming on the earth.

- Up to 100 million sharks are killed every year for meat and fins, which makes some rare and endangered sharks cause an ecological imbalance of the ocean.

- More than 3.5 billion people depend on oceans for their main food source. For 20 years, this number could double to 7 billion.

- The total length of the world's coastline is about 315,000 miles, which is equivalent to a 12-fold equatorial road. However, more than 60% of the Pacific Coast coastline and 35% of the Atlantic Coast coastline is being eroded year after year due to increasing population density. More than half of the world's population lives within 60km to 100km of distance from the coast to about 2.7 billion people.

- 90% of all volcanic activity occurring on the earth is concentrated in the ocean, the largest concentration is in the South Pacific.

- Freezing temperature in the oceans is about -1.9 degrees C.

- Under the enormous pressure of the ocean, the temperature of the sea water can rise very high (up to 400 degrees C).

- The Arctic Ocean is the smallest ocean, holding only 1% of Earth's seawater.

- Every year, there are about 10,000 to 50,000 icebergs from the Arctic to the oceans.

- Oceans absorb 30% to 50% of the carbon dioxide produced by the fusion of fossil fuels. Carbon dioxide is absorbed and transported down by plankton.

- Some scientists estimate that the oceans contain about 50 million billion tons of dissolved substances, namely salts including sodium chloride, calcium, magnesium, common salt, etc.

- Atlantic ocean water contains the highest salt content in the world.

- The average rate of sea level rise is about 4-10 inches (10-25cm) over the past 100 years. Sea level will continue to increase even when the climate is stable, because the ocean reacts slowly to changes in the environment.

- Oil is one of the greatest resources of the ocean. It is made up of organic sediments that have been deposited over millions of years from the bodies of animals and organisms that exist on the ocean floor, combined with mud and silt. Over a long period of time along with temperature, pressure changes create sediment layers.