How much water is in the ocean?
While there is only one global ocean, the vast body of water that covers 71 percent of the Earth is geographically divided into distinct named regions. The boundaries between these regions have evolved over time for a variety of historical, cultural, geographical, and scientific reasons. Life began here. The oceans cover 71 percent of the Earth's surface and contain 97 percent of the Earth's water. Less than 1 percent of the Earth's water is fresh water, and percent is contained in glaciers and ice caps. The oceans contain 99 percent of the living space on the planet.
Looking at our Earth from space, it is obvious that we live on a water planet. Ocean covers over 70 percent of Earth's surface and contains about 97 percent of Earth's surface water. How much do you know about our ocean? The Ocean Looking at our Earth from space, it is obvious that we live on a water planet. You scored out of 9. Share your score. True B. Water evaporates from the ocean, cools and turns into clouds made wgat water molecules or ice particles.
As the atmosphere moves the water vapor around the planet, those droplets come down to Earth's surface, forming rivers, thf lakes and streams, and so on, and then yhe to the ocean. This is called the "hydrological cycle. Pf and rivers B. The Earth's interior C. Oceah atmosphere D. The oceab E.
The polar ice caps. Most of Earth's water Most of the fresh water is tied up in glaciers and ice sheets, which means that only a relatively small portion is available to sustain human, plant and animal life. The additional mass of rock that composes the undersea mountains and the lack of rock in trenches provide gravitational telltales that GRACE can detect.
Melting sea ice B. Melting land ice C. Both have the how to license a name effect on global sea level.
Sea level rise is caused primarily by two factors related to global warming: the added water from melting land ice and the expansion of seawater as it warms. Melting sea ice does not contribute nearly as much to ocean water perrcent because floating ice displaces water in an amount equal to its volume. Some coastal regions and island nations have begun to experience the consequences of sea level rise.
Rising seas not only affect dwellings and structures, but fresh water is also affected as rising saltwater begins to contaminate it through "saltwater intrusion. The measure of tsunami strength B. The light reflected off of percebt ocean's surface C. Salt concentration on the ocean's surface D. All of the tue. NASA's Aquarius satellite measures sea surface salinity from space. The concentration of salt on the ocean's surface — the part of the ocean that actively exchanges water and heat with Earth's atmosphere — is a critical driver of ocean processes and climate variability.
The wind B. The moon's gravitational pull C. The gravitational pull of both the moon and the sun D. Both the sun and the moon influence tide rise and fall, which are caused by the gravitational attraction between what is crystal methamphetamine ingredients ocean and the moon as well as the ocean and the sun.
Ocean surface what does the word ambulatory mean B. Ocean surface topography C. Ocean surface pressure gradient. Sea what pain medicine is given for fibromyalgia topography is influenced by both gravity and ocean circulation. Accurate gravity eaarth are critical for determining large- and medium-scale ocean circulation patterns.
Risen B. Fallen C. Remained about the same. Sea level is a global climate change indicator. Gulf Stream B. Antarctic Circumpolar Current C. Japan Current Eaarth. California Current. Ocean currents are driven by ocean winds and influenced by the "Coriolis effect.
Most currents form "gyres," or large systems of rotating ocean currents. In the Southern Ocean around Antarctica, there is no land, which allows the Antarctic Circumpolar Current to travel around the globe uninterrupted.
Mar 22, · The ocean is a continuous body of salt water that covers more than 70 percent of the Earth's surface. Ocean currents govern the world's weather and churn a Author: Christina Nunez. 5 rows · Aug 19, · The ocean covers about 71% of the surface of the Earth. As per estimates, 97% of the water on. The Earth is covered with 71 percent by oceans. The oceans hold close to 97 percent of all Earth's water.
However, this ocean has been divided into distinct named geographic regions by countries and oceanographers. The ocean houses a plethora of marine organisms ranging from marine microbes to the world's largest animal, the blue whale. The rest remains a mystery. The Arctic Ocean has a roughly circular basin that is nearly enclosed by the continental landmasses of North America, Eurasia, Greenland, and several smaller islands.
The area occupied by the ocean is about 15,, square km, and its coastline extends for 45, km. The maximum recorded depth is found to be 18, feet. The Arctic Ocean is located in a polar climatic zone characterized by frigid year-round temperatures.
Long hours of darkness engulf the ocean during winters and summers are characterized by continuous daylight. The marine habitat of the Arctic Ocean is a fragile ecosystem that is highly susceptible to slight disruptions in weather.
Threatened species of whales and walruses inhabit the ocean. Plant life in the Arctic Ocean is scarce except for abundant volumes of phytoplanktons. The ocean bed also hosts petroleum and natural gas fields, polymetallic nodules, and placer deposits. Like other oceans of the world, climate change threatens to adversely affect the marine ecosystem of the Arctic Ocean.
As per research, the Arctic might become ice-free by This transformation would load the Arctic with large volumes of meltwater and affect the ocean currents prevailing in the region. These alterations would, in turn, cause a drastic change in the global climate. The Atlantic Ocean spans an area of 85,, square km. The average depth of the Atlantic Ocean is 3, m and the Milwaukee Deep 8, m in the Puerto Rico Trench, is its deepest known point. Since the Atlantic Ocean is vast, its climate varies widely from the north to the south.
Warm and cold ocean currents in the Atlantic also influence the climate of the coastal areas on the shores of the Atlantic. The Gulf Stream and the North Atlantic Drift are responsible for keeping large parts of the coast of north-western Europe and the British Isles warm when the coast of Newfoundland in Canada on the same latitude experiences extreme temperatures in winter. The Atlantic Ocean has contributed significantly to the economy of many nations.
The Atlantic also hosts rich fishing resources with haddock, cod, mackerel, herring being the chief commercially important fish species. Several rare and threatened species of marine life like sea turtles, whales, dolphins, manatees, seals, sea lions abound in the Atlantic.
Frequent oil spills, municipal sewage pollution, industrial pollution, bycatch during irresponsible and outdated fishing activities all threaten the marine life in the Atlantic Ocean. The Eurasian landmass lies to the north of the Indian Ocean, Australia to the east, Africa to the west and the Southern Ocean and Antarctica to the south.
The depth in this region is 8, m. The Indian Ocean region experiences a monsoon type of climate. Cyclones are common during the summer season. This ocean is also the warmest ocean in the world.
The warm tropical waters of the ocean support a great diversity of life. The abundance of phytoplankton and aquatic flora supports a complex food chain. Thus, the Indian Ocean offers lucrative fishing grounds and fish, especially tuna and shrimp caught here, are sold to markets across the world.
However, despite this great biodiversity, climate change is taking its toll on the Indian Ocean ecosystem. Overfishing in the waters is also disturbing the marine life in this part of the ocean. Spanning an area of ,, square km, the Pacific Ocean accounts for one-third of the total surface area of the planet. Large parts of the Pacific remain unexplored due to its great depths. However, in the relatively shallow waters off the coast of Australia and New Zealand, petroleum and natural gas deposits have been discovered.
Pearl extraction is also common in the Pacific's waters. A large variety of fish like tuna, salmon, swordfish, herring, snapper, etc. Today, the Pacific Ocean and its marine life are not safe. A large number of highly polluted rivers from the countries of southeast Asia and east Asia drain into this ocean, contaminating the waters with pollutants. Fertilizer and pesticide wash-off from agricultural fields, sewage, and industrial wastes all drain into the ocean via these rivers.
Excess of oxygen depleting pollutants triggers hypoxia and creates dead zones in the ocean. Overfishing in the Pacific has also depleted its marine wealth greatly. A number of rare and threatened species is getting depleted in large numbers as bycatch. It is the southernmost of the 5 regions of the Global Ocean and the fourth largest of the five. It is a deep ocean with depth ranging between 4, and 5, m across most parts.
Researchers estimate that the Southern Ocean seabed is a storehouse of massive oil and gas fields, valuable minerals like gold, placer deposits, manganese nodules, and more. The icebergs of the Southern Ocean are treated as freshwater resources, sufficient to feed every person on Earth for a period of several months.
The Southern Ocean is also one of the most dangerous parts of the ocean for ships. Choppy seas, storms, and iceberg interventions are common. The remoteness also prevents rescue missions from reaching the ships in need. The Southern Ocean is home to unique species specially adapted to survive the frigid weather conditions. Penguins, orcas, whales, seals, colossal squids are some of the most notable species of the Southern Ocean. A large number of migratory birds can be spotted in the oceanic region and Antarctica.
These include terns, gulls, albatrosses, skuas, petrels, etc. Several threats are experienced by the marine inhabitants of the Southern Ocean. Unregulated fishing also reduces the fish stock in the ocean which disturbs the food chain and affects the survival of the other species in the chain. However, there is only one Global Ocean.
The ocean remains one of the most unexplored places on Earth. Mediterranean Countries. Scandinavian Countries. What Is A Lagoon? What Is An Oxbow Lake? Differences Between Sea And Lake. What Is Pangea?