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Hadalpelagic Zone. The deepest zone of the ocean, the hadalpelagic zone extends from 6,000 meters (19,700 feet) to the very bottom, 10,994 meters (36,070 feet) in the Mariana Trench off the coast of Japan. The temperature is constant, at just above freezing.
The ocean water column is made up of five zones: the sunlight zone (epipelagic), the twilight zone (mesopelagic), the midnight zone (bathypelagic), the abyssal zone (abyssopelagic) and the hadal zone (trenches). The upper layer of the ocean is known as the sunlit, or euphotic, zone.
From the intertidal zone, where land meets the sea, to the depths of the oceanic zone, where darkness rules, each oceanic zone presents unique characteristics, inhabitants, and seabed structures. The zones of the ocean are defined by their depth and light penetration
Five different basins comprise the world ocean: Pacific, Atlantic, Indian, Southern, and the Arctic. With an average of 3,700 meters depth, the ocean is divided into several zones. The process of dividing it into layers is called ocean layering.
The sunlight zone, twilight zone, and deep ocean are the three major zones of the ocean. The deep ocean is further divided into 3 layers which are the midnight zone, the abyss and the trenches. The ocean covers more than 70% of the Earth’s total surface and contains roughly 97% of all its water.
The oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf (e.g. the neritic zone), but operationally is often referred to as beginning where the water depths drop to below 200 metres (660 ft), seaward from the coast into the open ocean with its pelagic zone.
Ocean Zones. Oceans are vast saltwater bodies that contain 97% of the planet’s water and cover about 70.8% of the Earth’s surface. Oceans are integral components of the Earth’s hydrosphere and are, therefore, critical to life on Earth.
The ocean has five major life zones, each with organisms uniquely adapted to their specific marine ecosystem. The epipelagic zone (1) is the sunlit upper layer of the ocean. It reaches from the surface to about 200 meters (660 feet) deep.
The deep ocean (or aphotic zone) gets no sunlight at all; animals create their own bioluminescent light and have light-sensitive eyes to sense the bioluminescent light of other animals. Drop from the surface to the deep in this to-scale image and learn more about the deep sea in our overview.
Ocean, continuous body of salt water held in enormous basins on Earth’s surface. There is one ‘world ocean,’ but researchers often separate it into the Pacific, Atlantic, Indian, Southern, and Arctic oceans.