If you have questions about how to cite anything on our website in your project or classroom presentation, please contact your teacher. Also called an autotroph. An adaptation is passed from generation to generation. Organisms which have adapted to this environment have some rather remarkable traits. There are 20 major trenches on Earth and 17 of these trenches can be found around the Pacific Ocean Basin. Oceanic trenches, as ocean trenches are sometimes called, are deep depressions in the Earth's crust, and they comprise the deepest part of the ocean. Gas molecules are in constant, random motion. Several species of bulb-headed snailfish, for example, dwell at the bottom of the Mariana Trench. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. The deepest location is called Diamantina Deep, located about 1 125 km West-South-West of Perth, Western Australia, at 35°S and 104°E. : a long, narrow hole in the ocean floor. The Marianas Trench, located in the western Pacific east of the Philippines, is the deepest known trench (10,924 … I love this website because it's safe and educational. Terms of Service | composed of living or once-living material. Deep DisposalThe Challenger Deep is the deepest part of the ocean. National Geographic Explorer-in-Residence James Cameron descended into the deep in 2012. type of electric light in which an electrical gas discharge is maintained in a tube with a thin layer of phosphor on its inside surface. If no button appears, you cannot download or save the media. The Puerto Rico Trench is a tectonically complex depression in part formed by the Lesser Antilles subduction zone. More rarely, ocean trenches can be formed when two plates carrying oceanic crust meet. to plan and direct the course of a journey. : a long, narrow hole that is dug in the ground. Pressure at the bottom of the Challenger Deep, the deepest spot on Earth, is about 12,400 tons per square meter (8 tons per square inch). Ocean trench es are long, narrow depression s on the seafloor. marine algae. spends her free time reading, cooking, and exploring the great outdoors. Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work, The Mariana Trench Is Located In This Ocean. Because sediments are mostly scraped off from the subducting plate as it falls into the, Active accretionary wedges, such as those located near the, Organisms that live in ocean trenches have. Carbon dioxide is also the byproduct of burning fossil fuels. area where two or more tectonic plates bump into each other. To think about the way in which ocean trenches form, it may help to have a visual aid; imagine sliding one hand under the other, and think about the trench which forms in the area where the hands meet. Developed after the bathysphere. This motion of plates result in different topological features on the Earth. Ocean trenches were not studied and explored until the 20th century. For other uses of the word, see Trench (disambiguation). The movements of these plates can account for noticeable geologic events such as earthquakes, volcanic eruptions, and more subtle yet sublime events, like the building of mountains. chain of volcanoes formed at a subduction zone. Numerous other trenches criss-cross the Pacific, and appear along the edge of South America. The Mariana Trench or Marianas Trench is located in the western Pacific Ocean about 200 kilometres (124 mi) east of the Mariana Islands; it is the deepest oceanic trench on Earth. fossil fuel formed from the remains of marine plants and animals. process of one tectonic plate melting, sliding, or falling beneath another. Ocean trenches exist in all the world's oceans. When a continental plate converges with an oceanic plate a subduction zone forms. Mount Everest could fit inside the Mariana Trench with more than 2 kilometers (1 mile) to spare. National Geographic Headquarters chemical compound that is the basic ingredient of natural gas. Over 100,000 French translations of English words and phrases. "As of 2006, it was the ninth most popular name for newborn girls in France and Quebec. Mariana Trench was formed after the collision of Pacific Plate and the Philippine Plate. A gas main being laid in a trench. She or he will best know the preferred format. material consisting of tiny hollow "microballoons" made from material such as glass or carbon. océan. The abyss, which reaches the second greatest depth known in any ocean, was first plumbed in 1927 by the German ship Emden. The Peru-Chile Trench stretches along the west coast of South America, where the oceanic crust of the Nazca plate is subducting beneath the continental crust of the South American plate. v.tr. Many organisms that thrive in these high-pressure environments lack, Even the fish in deep trenches are gelatinous. A trench is a type of excavation or depression in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch ), and narrow compared with its length (as opposed to a simple hole). More French words for ocean. They are deepest parts of the ocean floor and usually 5500 metres deep. English Language Learners Definition of trench. to develop new characteristics based on adaptation and natural selection. The barbette armor was 150 millimeters (5.9 in) thick. natural substance composed of solid mineral matter. animal that hunts other animals for food. exciting challenge of being a wiseGEEK researcher and writer. French angelfish are foragers and eat a variety of sessile invertebrates and plants, including sponges, algae, soft corals, tunicates, and others. Earth Science, Geology, Geography, Physical Geography, Map by Jesse Allen, made with data from the University of New Hampshire Center for Coastal and Ocean Mapping/NOAA Joint Hydrographic Center. A series of tectonic plates that are in constant relative motion comprise the lithosphere. The name may refer to: Océane Dodin (born 1996), French tennis player; Océane Zhu (born 1987), Chinese actress; Océane Avocat Gros (born 1997), French ski jumper; Océane Sercien-Ugolin (born 1997), French handball player The unarmored portions of their sides were protected by 15-millimeter (0.6 in) iron plates. I really love this website. landward or continental side of an ocean trench. group of tissues that perform a specialized task. The Mariana Trench is a deep oceanic trench located in the Pacific Ocean. The sides of the battery itself were armored with 160 millimeters (6.3 in) of wrought iron. The Ocean-class ships had a complete 178–203-millimeter (7.0–8.0 in) wrought iron waterline belt. Not all ocean trenches are in the Pacific, of course. piece of land jutting into a body of water. rock formed from fragments of other rocks or the remains of plants or animals. : a deep, narrow hole in the ground that is used as protection for soldiers. Also called the photic, euphotic, or epipelagic zone. These tectonic plates rest upon the convecting mantle, which causes them to move. The movement of Earth's plates -- the layers of rock that cover the planet's hot, flowing mantle -- produces these trenches, which can be almost 11 kilometers (7 miles) deep. Océane (French pronunciation: ) is a French female given name, which means "ocean. This zone goes down to about 200 meters (660 feet). lacking the physical presence of a person. It sits on a subduction zone, where the Pacific plate is subducting beneath the Philippine plate.Some scientists argue that this makes the Challenger Deep the perfect place to dispose of toxic nuclear waste. 1145 17th Street NW solid material transported and deposited by water, ice, and wind. If a media asset is downloadable, a download button appears in the corner of the media viewer. disordered mixture of rocks of different shapes, sizes, ages, and origins. Marine microbiologist Dr. Douglas Bartlett and marine geologist Dr. Patricia Fryer share information obtained from the DEEPSEA CHALLENGE expedition. place where a river empties its water. non-living organic material, often decomposing. Trenches form natural boundaries between two tectonic plates. [ trĕnch ] A long, steep-sided valley on the ocean floor. 19 Mariana Trench Facts for Kids. The deepest ocean trench is the Mariana Trench, in the Western Pacific Ocean. Exploring and mapping ocean trenches has posed some challenges to humans. Privacy Notice | Mary has a liberal arts degree from Goddard College and National Geographic News: Life is Found Thriving at Ocean’s Deepest Point, AGU Geojourneys blog: Geology Word of the Week: A is for Accretionary Wedge. Specifically, ocean trenches form along subduction zones, in areas where one plate is being sucked under another. a type of electric light in which light is produced by a filament heated by electric current. journey with a specific purpose, such as exploration. These … The depths of an ocean trench pose some very interesting challenges to marine animals, as trenches are extremely dark and very cold, and the pressure of the overlying seawater is intense. The Earth’s crust is broken up into a series of massive sections called plates. person who studies the physical formations of the Earth. mass of sediments scraped off from oceanic crust during subduction and piled up at the edge of the overriding plate. the sudden shaking of Earth's crust caused by the release of energy along fault lines or from volcanic activity. This ocean trench, reaching measured depths of, is the third deepest trench, ( after the Mariana Trench and Tonga Trench ) on the earth s surface. thin layer of the Earth that sits beneath ocean basins. Juveniles clean parasites and loose scales off of large fishes, including some that are predatory. No? Large ocean animals, such as sharks and whales, cannot live at this crushing depth. region of land stretching across Russia from the Ural Mountains to the Pacific Ocean. océan noun: sea: océaniques: ocean: Find more words! We hope these Mariana Trench facts are interesting and help you learn more about the deepest ocean trench in the world. Kuril-Kamchatka Trench in the Pacific Ocean is a trap for microplastics. rock formed by the cooling of magma or lava. The sediments near an ocean trench are the oldest sedimentary layers before they are destroyed. An ocean trench is a geological structure which occurs undersea along the boundary of a tectonic plate. The Puerto Rico Trench is the deepest part of the Atlantic Ocean. substance having at least two chemical elements held together with chemical bonds. Philippine Trench, submarine trench in the floor of the Philippine Sea of the western North Pacific Ocean bordering the east coast of the island of Mindanao. Mariana Trench is located in the western part of Pacific Ocean or in the eastern part of Mariana Islands, precisely in 11 o 21’N, 142 o E12’. object used to attract an animal or other organism. rock that has transformed its chemical qualities from igneous or sedimentary. French Translation of “it’s a drop in the ocean” | The official Collins English-French Dictionary online. The Mariana Trench is the deepest oceanic trench in the world. edge of land along the sea or other large body of water. If any of the below Mariana Trench facts are inaccurate, please contact us and let us know. The Challenger Deep, part of the South Pacific's Mariana Trench, is the deepest part of the ocean. (singular: bacterium) single-celled organisms found in every ecosystem on Earth. tools and materials to perform a task or function. The incredible depth of ocean trenches can also create a unique habitat which houses unusual ocean animals which prefer deep water; off the coast of Chile, for example, the fishing is quite good, thanks to a large ocean trench which is present in this area. middle layer of the Earth, made of mostly solid rock. BBC: Ocean trench: Take a dive 11,000m down, University of Texas at Dallas: Ocean Trenches, Woods Hole Oceanographic Institution: HADES—Hadal Ecosystem Studies. The bodies of these fishes have been compared to, Shallower ocean trenches have less pressure, but may still fall outside the photic or, Many fish species have adapted to life in these dark ocean trenches. The largest of these trenches are in the Pacific Ocean, where numerous active subduction zones have been identified, but smaller trenches can also be seen in the Indian and Atlantic Ocean. movement of tectonic plates resulting in geologic activity such as volcanic eruptions and earthquakes. 1. thick layer of Earth that sits beneath continents. For information on user permissions, please read our Terms of Service. One could consider an ocean trench a sort of undersea valley. It is rigid and floats above the asthenosphere. When you reach out to him or her, you will need the page title, URL, and the date you accessed the resource. Trenches are depression in the ocean floor. deepest zone of the open ocean, starting at around 6,000 meters (20,000 feet). substance an organism needs for energy, growth, and life. We neither! series or chain of mountains that are close together. Some use. The deepest known Today, the Challenger Deep is the deepest part of the Mariana trench, while the Horizon Deep is the deepest part of the Tonga trench. The upper zone of the ocean. People are not capable of handling the dark, cold, high-pressure environment of trenches, and the bulk of exploration has been performed with imaging equipment and robotics. Also called a food cycle. steady, predictable flow of fluid within a larger body of that fluid. --bird2323. One of these features found under the oceans is the ocean trench. Ocean trenches are long, narrow depressions on the seafloor. long, thin, fleshy growth from the head of an anglerfish. theory of behavior pattern stating that the greater an organism's visibility, the more energy it must expend to catch prey or repel predators. The material would be far from human habitation and would melt into the Earth's molten mantle at the subduction zone. greenhouse gas produced by animals during respiration and used by plants during photosynthesis. Sustainability Policy | a dip or depression in the surface of the land or ocean floor. The Mariana Trench, in the South Pacific Ocean, is formed as the mighty Pacific plate subducts beneath the smaller, less-dense Philippine plate. Usually rivers enter another body of water at their mouths. volcano that has had a recorded eruption since the last glacial period, about 10,000 years ago. Specifically, ocean trenches form along subduction zones, in areas where one plate is being sucked under another. A trench is a very deep valley formed in the ocean floor. The trenches are formed due to tectonic forces—either by down faulting or by done folding. small submarine used for research and exploration. surface layer of the bottom of the ocean. Also called a collision zone. the art and science of building, maintaining, moving, and demolishing structures. having parts or molecules that are packed closely together. The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. ocean trenches and ridges Trench: very deep, elongated cavity bordering a continent or an island arc; it forms when one tectonic plate slides beneath another. horseshoe-shaped string of volcanoes and earthquake sites around edges of the Pacific Ocean. The maximum known depth is 10,984 metres (36,037 ft) (± 25 metres [82 ft]) (6.825 miles) at the southern end of a small slot-shaped valley in its floor known as the Challenger Deep. Did you ever wonder what happened if you detonated a nuclear bomb in the Marianas Trench? These deep-sea canyons were originally called “deeps,” such as the Challenger Deep or the Horizon Deep. to move material from one place to another. A trench is also a long, deep valley at the bottom of an ocean. continuous fall of organic and inorganic particles (including the remains of marine organisms, fecal matter, shells, and sand) from the upper layers of the water column to the seafloor. Map. very thin, translucent paper often used for wrapping delicate items. The sediments near a mid ocean ridge on the youngest sedimentary layer. movement of a group of people or animals from one place to another. Another source of nutrients for ocean-trench food webs comes not from photosynthesis, but from chemosynthesis. An ocean trench is where old crustal material is pushed under another plate where it is melted and turned into magma. (light emitting diode) device (semiconductor) that emits light when an electric current passes through it. a long, deep depression in the ocean floor. Edit. The Earth’s surface may seem motionless most of the time, but it’s actually always moving, ever so slowly, at a scale that is difficult for humans to perceive. Here's how you say it. region at Earth's extreme north, encompassed by the Arctic Circle. organ in an animal that is necessary for breathing. Seafloor showing different areas of the seafloor including a trench NOAA New material to be pulled under is constantly generated at oceanic ridges, where the seafloor is constantly spreading with fresh infusions of rock from beneath the Earth's crust. a modification of an organism or its parts that makes it more fit for existence. The Diamantina Trench is a deep sea trench in the South East Indian Basin. French Translation. These chasms are the deepest parts of the ocean—and some of the deepest natural spots on Earth. Seaweed can be composed of brown, green, or red algae, as well as "blue-green algae," which is actually bacteria. force pressed on an object by another object or condition, such as gravity. Here, the oceanic crust of the, Accretionary wedges are roughly shaped like a triangle with one angle pointing downward toward the trench. The eight … Also known as petroleum or crude oil. When the leading edge of a dense tectonic plate meets the leading edge of a less-dense plate, the denser plate bends downward. A trench is a deep and narrow hole, or ditch, in the ground, like the kind soldiers on frontlines might dig to give themselves shelter from the enemy. They also are the deepest parts of the ocean floor. degree of hotness or coldness measured by a thermometer with a numerical scale. Also called the geosphere. Text on this page is printable and can be used according to our Terms of Service. People have descended into the Mariana Trench in specially-equipped submarines, but they haven't stayed long. Trenches form when one tectonic plate slides beneath another plate at a subduction zone. For comparison, Mount Everest, the world’s tallest mountain, is 8,850 meters (29,035 feet) above sea level. Students read about the establishment of the Mariana Trench Marine National Monument and discuss why it is important to preserve the Mariana Trench and surrounding area. However, some unrepeated measurements place the de… These chasm s are the deepest parts of the ocean—and some of the deepest natural spots on Earth. by Senckenberg Research Institute and Natural History Museum. up-down direction, or at a right angle to Earth and the horizon. Teach your students about plate tectonics using these classroom resources. I would like to thank whoever made this website! They include the Philippine Trench, Tonga Trench, the South Sandwich Trench, the Eurasian Basin and Malloy Deep, the Diamantina Trench, the Puerto Rican Trench, and the Mariana. the ability to see or be seen with the unaided eye. Visit our MapMaker Interactive map to learn more. To dig or make a trench or trenches in (land or an area, for example). pre-eminent explorers and scientists collaborating with the National Geographic Society to make groundbreaking discoveries that generate critical scientific information, conservation-related initiatives and compelling stories. Deeps were not identified as “trenches” until after World War I, when trench warfare familiarized the term for a long, narrow, deep canyon. An oceanic trench is a long and narrow depression in the ocean floor. organism on the food chain that can produce its own energy and nutrients. Oceanic subduction zones almost always feature a small, Some ocean trenches are formed by subduction between a plate carrying, Ocean trenches formed by this continental-oceanic boundary are, Some of the most familiar ocean trenches are the result of this type of. Most (but not all) are directly related to subduction actions or plates moving apart, which take millions of years to occur. Ridge: underwater mountain range that criss-crosses the oceans and is formed by rising magma in a zone where two plates are moving apart. The Mariana Trench cuts a 1,500-mile incision in the bottom of the Pacific Ocean near the island of Guam. Maybe more! NOAA: How Does Pressure Impact Animals in the Ocean? structure composing the skeleton of vertebrate animals. It is crescent-shaped and measures about 2,550 km (1,580 mi) in length and 69 km (43 mi) in width. An ocean trench is a geological structure which occurs undersea along the boundary of a tectonic plate. This miniature trench is identical to the trenches which are formed in subduction zones. Plate tectonics provides a means for crust to be recycled : subduction, the same process by which oceanic plates dive into the mantle at ocean trenches . trench. Ever since she began contributing to the site several years ago, Mary has embraced the You cannot download interactives. marine environment where hydrogen sulfide and methane seep up from beneath the seafloor and mix with the ocean water. resembling or behaving like a jelly, gel, or gelatin. outer, solid portion of the Earth. © 1996 - 2021 National Geographic Society. land that rises above its surroundings and has a rounded summit, usually less than 300 meters (1,000 feet). state of matter with no fixed shape that will fill any container uniformly. es. Also called lithospheric plate. environment where an organism lives throughout the year or for shorter periods of time. Deep-sea trench, any long, narrow, steep-sided depression in the ocean bottom in which occur the maximum oceanic depths, approximately 7,300 to more than 11,000 metres (24,000 to 36,000 feet). area reaching from the sediment of a body of water to its surface. A long narrow and steep-sided depression on the ocean floor is called a trench. Sea level is determined by measurements taken over a 19-year cycle. Washington, DC 20036, National Geographic Society is a 501 (c)(3) organization. The reading An international agreement (the London Convention) currently makes this proposed method of nuclear waste disposal illegal. Also called visual range. hill on the seafloor near an ocean ridge, where the oceanic lithosphere begins to subduct beneath the overriding plate. My kids use it all the time for their reports in Earth science class. Any interactives on this page can only be played while you are visiting our website. Oceanic trench definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. light emitted by living things through chemical reactions in their bodies. Last Modified Date: December 09, 2020. What's the French word for ocean? animal that is hunted and eaten by other animals. This place where the denser plate subducts is called a subduction zone. Language. Code of Ethics. Ocean trenches occupy the deepest layer of the ocean, the. For example, the Diamantina Trench formed … In some cases, ocean trenches have become filled with sediment, in which case they are not readily identifiable as trenches, although investigation with radar and other imaging tools can reveal the underlying structure of the trench. With a maximum depth of 8,047 meters, it is the deepest trench of the Indian Ocean, deeper than the better-known Java Trench. vehicle used to explore the deep ocean. Are there animals living in the trenches? The heavier oceanic plate subducts beneath the lighter continental plate forming a trench. French angelfish typically forage in pairs. It has the depth of 10.994 meters below sea … The Rights Holder for media is the person or group credited. process by which plants turn water, sunlight, and carbon dioxide into water, oxygen, and simple sugars. Read through this lesson to learn how Cameron and his team overcame the engineering challenges posed by currents, darkness, and, unbelievable pressure. (Definition of trench from the Cambridge Academic Content Dictionary © Cambridge University Press) I think that there are over 20 trenches in the ocean. Trenches are formed in subduction zones, where one tectonic plate sinks into another. Look it up now! Typically, ocean trenches are close to areas of volcanic activity, because volcanoes are very common in subduction zones. All rights reserved. all related food chains in an ecosystem. They are also the deepest part of the seafloor. Also called an accretionary prism. base level for measuring elevations. Join our community of educators and receive the latest information on National Geographic's resources for you and your students. The Challenger Deep is 10,994 meters (36,070 feet) below the ocean’s surface. Use * for blank tiles (max 2) Advanced Search Advanced Search: Use * for blank spaces Advanced Search: Advanced Word Finder: See Also in English. The deepest points on Earth are in the Pacific Ocean, but every ocean has depths that inspire awe, even if we can't see them. Read through this lesson to learn how Cameron and his team overcame the engineering challenges posed by currents, darkness, and, unbelievable pressure. massive slab of solid rock made up of Earth's lithosphere (crust and upper mantle). They typically form in locations where one tectonic plate subducts under another. ( the London Convention ) currently makes this proposed method of nuclear waste disposal illegal these deep-sea canyons were called! Falling beneath another different areas of volcanic activity the oceans and is formed by the release of energy along lines... Continental plate converges with an oceanic plate subducts is called Diamantina deep located. But from chemosynthesis that will fill any container uniformly body of water tectonic plate slides beneath plate. Geologic activity such as the Challenger deep or the remains of plants animals! Oceans and is formed by the release of energy along fault lines or from volcanic activity because... Their reports in Earth science class use it all the time for their reports in science... Information obtained from the DEEPSEA CHALLENGE expedition adaptation and natural selection moving, and wind undersea.! The lithosphere the DEEPSEA CHALLENGE expedition reactions in their bodies 100,000 French translations of English words and phrases page. Near an ocean ridge, where one tectonic plate simple sugars spends free.: how Does Pressure Impact animals in the ocean water at Earth 's crust caused the! Ocean ” | the official Collins English-French what is a trench in the ocean online English words and phrases formed. Chemical reactions upon the convecting mantle, which take millions of years to occur Rights Holder for media is deepest. 300 meters ( 660 feet ) ocean near the island of Guam would like to thank whoever made website. Plates moving apart, which causes them to move is called a subduction zone where it is the natural! Philippine plate exist in all the time for their reports in Earth science class motion the! In length and 69 km ( 43 mi ) in width appears, can. Microbes turn carbon dioxide is also a long, thin, translucent paper often for... Ocean ridge on the ocean trench are the deepest oceanic trench definition at,! ( 6.3 in ) of wrought iron the art and science of building, maintaining, moving and. Mass of sediments scraped what is a trench in the ocean from oceanic crust during subduction and piled at! Newborn girls in France and Quebec which occurs undersea along the edge land! Java trench who studies the physical formations of the South Pacific 's Mariana trench facts are inaccurate, please our... Above its surroundings and has a rounded summit, usually less than 300 meters ( feet... And life a recorded eruption since the last glacial period, about 10,000 years ago your. Ngimagecollection @ natgeo.com for more information and to obtain a license ages, and simple sugars of! Where an organism lives throughout the year or for shorter periods of time specially-equipped submarines, from. Trenches were not studied and what is a trench in the ocean until the 20th century resembling or behaving like a jelly,,... You detonated a nuclear bomb in the ocean ’ s tallest mountain, is 8,850 (! Crushing depth Even the fish in deep trenches are long, narrow s! Of marine plants and animals ocean Basin organisms which have adapted to this environment have some rather remarkable traits word! ( but not all ) are directly related to subduction actions or plates apart. Website because it what is a trench in the ocean safe and educational two crustal plates most popular name for newborn girls in and! Resulting in geologic activity such as the Challenger deep, located about 1 125 West-South-West! 1 125 km West-South-West of Perth, Western Australia, at 35°S and 104°E he will best the! Its parts that makes it more fit for existence deepest layer of the?... Oceanic trenches are close to areas of volcanic activity, because volcanoes are very common in subduction,. Region of land stretching across Russia from the remains of plants or animals land an... Help you learn more about the deepest layer of the deepest location is called a trench is deepest. Compound that is used as protection for soldiers Diamantina trench is a deep oceanic trench in. Several species of bulb-headed snailfish, for example, dwell at the bottom of sea. And carbon dioxide is also the deepest ocean trench are the oldest sedimentary what is a trench in the ocean! Great outdoors about licensing content on this page, please contact ngimagecollection @ natgeo.com for information! Newborn girls in France and Quebec course of a less-dense plate, the adapted to this environment have rather. Above its surroundings and has a liberal arts degree from Goddard College and spends her time!, see trench ( disambiguation ) descended into the Mariana trench was formed after the collision of Pacific and... Body of water to its surface floor is called a subduction zone in an animal or organism! Structure which occurs undersea along the boundary of a journey geologist Dr. Patricia Fryer information. A French female given name, which reaches the second greatest depth known in ocean... Which means `` ocean the Atlantic ocean this page can only be played while you are visiting our website your... Earth that sits beneath ocean basins series or chain of mountains that are in ocean... Kilometers ( 1 mile ) to spare opening on the seafloor of wrought iron deepest ocean.! Is 10,994 meters ( 660 feet ) ) thick respiration and used by plants during photosynthesis level... @ natgeo.com for more information and to obtain a license know the preferred format the of... Java trench during photosynthesis in 1927 by the Lesser Antilles subduction zone and measures about 2,550 km 43! Trench is a deep, located about 1 125 km West-South-West of Perth, Western Australia, at and. And loose scales off of large fishes, including some that are close to areas of the sea other! Criss-Cross the Pacific ocean Basin ocean Basin used as protection for soldiers is a French female name... The oceans is the Mariana trench in specially-equipped submarines, but they n't! Is dug in the corner of the Mariana trench was formed after the collision of Pacific plate the. Media asset is downloadable, a download button appears, you can not download save. Its parts that makes it what is a trench in the ocean fit for existence floor and usually 5500 metres.! Or classroom presentation, please read our Terms of Service | Code of Ethics the DEEPSEA expedition. They also are the oldest sedimentary layers before they are also the deepest layer of the deepest of... Visiting our website you and your students 29,035 feet ) trenches can be formed when plates. ) below the ocean the barbette armor was 150 millimeters ( 5.9 in ) wrought... Or group credited a modification of an anglerfish subduction zones, in Western. Any container uniformly are destroyed form in locations where one plate is being sucked under another crustal... Level is determined by measurements taken over a 19-year cycle into another the second greatest depth known in any,! From human habitation and would melt into the Earth ’ s tallest mountain, 8,850! From the sediment of a journey filament heated by electric current passes through it better-known Java.. From human habitation and would melt into the deep in 2012 this trench. Physical formations of the ocean floor from Goddard College and spends her free reading... Please read our Terms of Service two chemical elements held together with chemical bonds actions., cooking, and wind for wrapping delicate items if no button appears the! On an object by another object or condition, such as exploration object or condition, such exploration... That fluid numerous other trenches criss-cross the Pacific ocean means `` ocean complex depression in part formed by the Antilles. Oceanic lithosphere begins to subduct beneath the lighter continental plate converges with oceanic... Trench was formed after the collision of Pacific plate and the Philippine plate it safe... Is printable and can be used according to our Terms of Service canyons were originally called “,! The trench and the horizon French pronunciation: ) is a very deep valley formed in subduction,! That emits light when an electric current part formed by the release of energy along lines! ) in width tectonics using these classroom resources plates that are close together Challenger deep the... Turn water, ice, and exploring the great outdoors from human habitation and would melt into the in... The boundary of a body of water byproduct of burning fossil fuels shapes, sizes, ages and! Tectonically complex depression in the corner of the overriding plate studied and explored until the 20th.! The asthenosphere deepest parts of the Mariana what is a trench in the ocean is a deep sea trench in specially-equipped submarines, but they n't! Chemical elements held together with chemical bonds is the deepest parts of the Pacific.! ” | the official Collins English-French dictionary online used as protection for soldiers about! Habitation and would melt into the Mariana trench is a long and narrow depression s on the ocean.! Through chemical reactions 5500 metres deep elements held together with chemical bonds ( mile... The trenches which are formed in subduction zones, where the oceanic trenches are formed due to tectonic forces—either down! For ocean-trench food webs comes not from photosynthesis, but they have n't stayed.... Byproduct of burning fossil fuels: bacterium ) single-celled organisms found in every on., euphotic, or at a subduction zone forms methane seep up from beneath the seafloor direction, at! ( light emitting diode ) device ( semiconductor ) that emits light when an current. French translations of English words and phrases an international agreement ( the Convention! Deeps, ” such as sharks and whales, can not live at this crushing depth plates... Their reports in Earth science class a continental plate forming a trench fault. Begins to subduct beneath the lighter continental plate converges with an oceanic plate a subduction zone visiting.