40 Amazing and Interesting Facts about Sea | Amazing Facts 4U
- The oceans occupy nearly 71% of our planet’s surface.
- More than 97% of all our planet’s water is contained in the ocean.
- An amazing fact is ten meters (33 feet) of ocean depth has the same mass as the whole atmosphere.
- 2.5 meters (8 feet) of ocean depth holds as much heat as the whole atmosphere and 2.5 centimeters (1 inch) of the ocean depth has as much water as the whole atmosphere.
- Seawater is approximately 3.5 percent salt.
- It’s amazing that the oceans contain enough salt to cover all the continents to a depth of nearly 500 feet.
- The average temperature of all ocean water is about 3.5° C.
- Amazingly the Antarctic ice sheet that forms and melts over the ocean each year is near twice the size of the United States.
- If all the ice in glaciers and ice sheets melted, the sea level would rise amazing 80 meters (262 ft), about the height of a 26-story building.
- The amazing fact is if the sea level should rise by 3 meters (10 feet), many of the World’s coastal cities, like Venice, London, New Orleans, and New York, would be underwater.
- Although tap water freezes at 0 degrees Celsius (32 degrees Fahrenheit), seawater does not freeze until about minus 2 degrees Celsius because 3% of it is salt.
- The area and volume of the Pacific Ocean are greater than the Atlantic and Indian combined.
- Amazingly the Pacific ocean has 25000 islands.
- The Arctic Ocean is the smallest and shallowest and coldest of all oceans. The Arctic Ocean holds just one percent of the Earth’s seawater. The amazing fact is this is still more than 25 times as much water as all rivers and freshwater lakes.
- The North Pole is situated in the middle of the Arctic ocean, there is no land at the north pole, it is a floating raft of ice.
- Amazingly the total length of the world’s coastlines is about 315,000 miles, enough to circle the Equator 12 times.
- Earth’s oceans are an average of 2 Miles deep.
- Every cubic mile of seawater holds over 150 million tons of minerals.
- Sunlight can penetrate a clean ocean up to a depth of 240 Ft.
- The deepest depth in the ocean is 36,198 feet (6.9 miles or 11 kilometers) at the Mariana Trench, in the Pacific Ocean well south of Japan near the Mariana Islands.
- It’s amazing that water pressure at the deepest point in the ocean is more than 8 tons per square inch, the equivalent of one person trying to hold 50 jumbo jets.
- The highest mountain in the sea is Mauna Kea, Hawaii which rises 33,474 feet (10,203 meters) from its base on the ocean floor; only 13,680 feet (4,170 m) are above sea level. Amazingly it is higher than Mount Everest.
- The deep-sea is the largest museum on Earth: There are more artifacts and remnants of history in the ocean than in all of the world’s museums, combined.
- We have only explored less than 5 percent of the Earth’s oceans. In fact, we have better maps of Mars than we do of the ocean floor.
- There are giant waterfalls under the ocean! The largest is between Greenland and Iceland. This submarine waterfall drops 11,500 feet; three times the height of any land waterfall.
- Amazingly it would take over an hour for a heavy object to sink down to the deepest part of the ocean.
- If the Earth was smooth, the ocean would cover the entire surface to an amazing depth of 12,000 feet.
- Annually, the amount of garbage that is dumped in the world’s oceans is three times the weight of fish that is caught from the oceans.
- 90 % of rubbish in the world’s oceans is plastic.
- 90% of all volcanic activity on Earth occurs in the ocean. The largest known concentration of active volcanoes (approximately 1,133) on the seafloor is located in the South Pacific.
- Tsunamis are caused by offshore earthquakes and travel at amazing 800 kilometers (500 miles) per hour as fast as a Jet Plane. At sea, they are hard to “see” because they’re no more than 10 centimeters (4 inches) high! As they come toward the shore, tsunamis build up many tens of meters high and can wash inland more than a kilometer.
- The Gulf Stream off the Atlantic seaboard of the United States flows at an amazing speed nearly 300 times faster than the typical flow of the Amazon River, the world’s largest river.
- The greatest tide change on earth occurs in the Bay of Fundy. The difference between low tide and high tide can be amazing 54 ft.
- Fishes cannot live in the Dead Sea because the water has too much salt in it.
- Coral reefs cover about one-fiftieth of the ocean floor, but about one-quarter of all marine species make reefs their home.
- There is a place in the Gulf of Alaska where two oceans meet but do not mix. Freshwater glaciers melted and flowed to join the ocean water. Because of the difference in the salinity and densities of these two water bodies, a surface tension develops between them that acts like a thin wall that prevents them from mixing. The boundary between the two is outlined by a thin layer of foam.
- An ocean wave generally can rise up to a maximum height of 21 m. Amazingly 516-meter ocean wave was recorded at the head of Lituya Bay, Alaska in 1958.
- The amazing fact is the world’s oceans contain nearly 20 million tons of gold.
- Three-quarters of the world’s mega-cities are by the sea. More than half the world’s population live within a 100 km or 60 miles distance from the coast.
- It’s amazing that plastic waste kills up to 1 million sea birds, 100,000 sea mammals, and countless fish each year.
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