272 relations: Acre, Aerobic organism, African Great Lakes, Agriculture, Alert, Nunavut, Algae, Algal bloom, Alkali sink, Amictic lake, Angling, Aral Sea, Asphyxia, Asteroid, Atmospheric pressure, Baffin Island, Basin and Range Province, Benthic zone, Biotic material, Bolivia, Caldera, California, Cameroon, Canada, Canton of Grisons, Caspian Sea, Cassini–Huygens, Charles Sutherland Elton, Chemocline, Circular sector, Climate, Coal, Continent, Crater Lake, Crater lake, Croatia, Crocodile, Dalmatia, Dead Sea, Death Valley, Deep water source cooling, Density, Depression (geology), Detritus, Dimictic lake, Dominican Republic, Drainage basin, Dry lake, Dutch language, Ecological succession, Ecology, ..., Endorheic basin, Epilimnion, Ethane, Eutrophication, Evaporation, Fen, Finger lake, Finland, Fish, Florida, Force, Fossil, Fresh water, Galileo (spacecraft), Geography, German language, Glacier, Graben, Great Bear Lake, Great Lakes, Great Salt Lake, Greater Sudbury, Groundwater, Halocline, Heat capacity, Hectare, Holomictic lake, Horst (geology), Hydroelectricity, Hydrology, Hypolimnion, Ice age, Ice shelf, Icelandic language, Impact event, India, Industry, Inorganic compound, Io (moon), Israel, Jordan, Jupiter, Karst, Karst lake, Kraken Mare, Lag Prau Pulté, Lagoon, Lahar, Lake Agassiz, Lake Baikal, Lake Beloye (Nizhny Novgorod Oblast), Lake Cerknica, Lake ecosystem, Lake Elgygytgyn, Lake Enriquillo, Lake Eyre, Lake Huron, Lake Ladoga, Lake Manitou, Lake Maracaibo, Lake Michigan, Lake Michigan–Huron, Lake monster, Lake Onega, Lake Puma Yumco, Lake stratification, Lake Superior, Lake Tanganyika, Lake Taupo, Lake Titicaca, Lake Toba, Lake Victoria, Lake Vostok, Lake Wanapitei, Lake Winnipeg, Lake Winnipegosis, Lakes of Titan, Landslide dam, Latin, Latitude, Lava, Lava lake, Ligeia Mare, Liman (landform), Limnic eruption, Limnology, List of lakes, List of lakes by area, List of lakes by depth, List of lakes of the United States, List of largest lakes of Europe, Littoral zone, Loch, Lonar Lake, Lunar mare, Luzon, Maar, Macrocosm and microcosm, Malheur Lake, Malheur River, Manitoulin Island, Mars, Marsh, Meander, Mere (lake), Meromictic lake, Meteorite, Methane, Middle English, Middle Low German, Monomictic lake, Moon, Moses Lake, Washington, Mount Mazama, Natural gas, Nettilling Lake, Nizhny Novgorod Oblast, Northern Hemisphere, Northwest Territories, Nunavut, Nutrient, Oil shale, Ojos del Salado, Oka River, Old English, Oligotroph, Ontario, Open and closed lakes, Oregon, Organic matter, Owens Lake, Oxbow lake, Oxygen saturation, Particle (ecology), Peat, Peru, Petroleum, PH, Philippines, Photic zone, Phragmites, Piedmont, Pingualuit crater, Piscivore, Plankton, Plunge pool, Polje, Polymictic lake, Pond, Prehistory, Profundal zone, Proglacial lake, Proto-Germanic language, Proto-Indo-European language, Qikiqtaaluk Region, Quake Lake, Quaternary, Ramsey Lake, Recreation, Relict (geology), Rift lake, Rift zone, River, River mouth, Sag pond, Saline water, Salinity, Salt, Salt lake, Salt pan (geology), Sand, Saturn, Sea breeze, Seawater, Secchi disk, Sediment, Sedimentary rock, Sevier Lake, Shale gas, Siberia, Silt, Sinkhole, Slough (hydrology), Slovenia, South Africa, Spacecraft, Sphagnum, State of Palestine, Stream, Subglacial lake, Subsidence, Sulfur, Sumatra, Suspension (chemistry), Swamp, Taal Lake, Tanzania, Tarn (lake), Temperate climate, Temperature, Thermocline, Tibet Autonomous Region, Titan (moon), Trophic cascade, Trophic state index, Tropics, Turbidity, Underground lake, United States, Upper Dumbell Lake, Utah, Varve, Vlei, Volcanic crater, Volcanism, Volcano, Water pollution, Water table, Wetland, Wollaston Lake, World Ocean, 1959 Hebgen Lake earthquake. Expand index (222 more) » « Shrink index
The acre is a unit of land area used in the imperial and US customary systems.
An aerobic organism or aerobe is an organism that can survive and grow in an oxygenated environment.
The African Great Lakes (Maziwa Makuu) are a series of lakes constituting the part of the Rift Valley lakes in and around the East African Rift.
Agriculture is the cultivation of land and breeding of animals and plants to provide food, fiber, medicinal plants and other products to sustain and enhance life.
Alert, in the Qikiqtaaluk Region, Nunavut, Canada, is the northernmost permanently inhabited place in the world, ("Twice a year, the military resupply Alert, the world's northernmost settlement.") at latitude 82°30'05" north, from the North Pole.
Algae (singular alga) is an informal term for a large, diverse group of photosynthetic organisms that are not necessarily closely related, and is thus polyphyletic.
An algal bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems, and is recognized by the discoloration in the water from their pigments.
An alkali sink is a salty basin land form.
Amictic lakes are "perennially sealed off by ice from most of the annual seasonal variations in temperature." Amictic lakes exhibit inverse cold water stratification whereby water temperature increases with depth below the ice surface 0 °C (less-dense) up to a theoretical maximum of 4 °C (at which the density of water is highest).
Angling is a method of fishing by means of an "angle" (fish hook).
The Aral Sea was an endorheic lake (one with no outflow) lying between Kazakhstan (Aktobe and Kyzylorda Regions) in the north and Uzbekistan (Karakalpakstan autonomous region) in the south.
Asphyxia or asphyxiation is a condition of severely deficient supply of oxygen to the body that arises from abnormal breathing.
Asteroids are minor planets, especially those of the inner Solar System.
Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet).
Baffin Island (ᕿᑭᖅᑖᓗᒃ, Qikiqtaaluk, Île de Baffin or Terre de Baffin), in the Canadian territory of Nunavut, is the largest island in Canada and the fifth largest island in the world.
The Basin and Range Province is a vast physiographic region covering much of the inland Western United States and northwestern Mexico.
The benthic zone is the ecological region at the lowest level of a body of water such as an ocean or a lake, including the sediment surface and some sub-surface layers.
Biotic material or biological derived material is any material that originates from living organisms.
Bolivia (Mborivia; Buliwya; Wuliwya), officially known as the Plurinational State of Bolivia (Estado Plurinacional de Bolivia), is a landlocked country located in western-central South America.
A caldera is a large cauldron-like depression that forms following the evacuation of a magma chamber/reservoir.
California is a state in the Pacific Region of the United States.
Canada is a country located in the northern part of North America.
The canton of (the) Grisons, or canton of Graubünden is the largest and easternmost canton of Switzerland.
The Caspian Sea is the largest enclosed inland body of water on Earth by area, variously classed as the world's largest lake or a full-fledged sea.
The Cassini–Huygens mission, commonly called Cassini, was a collaboration between NASA, the European Space Agency (ESA), and the Italian Space Agency (ASI) to send a probe to study the planet Saturn and its system, including its rings and natural satellites.
Charles Sutherland Elton (29 March 1900 – 1 May 1991) was an English zoologist and animal ecologist.
A chemocline is a cline caused by a strong, vertical chemistry gradient within a body of water.
A circular sector or circle sector (symbol: ⌔), is the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector.
Climate is the statistics of weather over long periods of time.
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams.
A continent is one of several very large landmasses of the world.
Crater Lake (Klamath: giiwas) is a caldera lake in south-central Oregon in the western United States.
A crater lake is a lake that forms in a volcanic crater or caldera, such as a maar; less commonly and with lower association to the term a lake may form in an impact crater caused by a meteorite, or in the crater left by an artificial explosion caused by humans.
Croatia (Hrvatska), officially the Republic of Croatia (Republika Hrvatska), is a country at the crossroads of Central and Southeast Europe, on the Adriatic Sea.
Crocodiles (subfamily Crocodylinae) or true crocodiles are large aquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia.
Dalmatia (Dalmacija; see names in other languages) is one of the four historical regions of Croatia, alongside Croatia proper, Slavonia and Istria.
The Dead Sea (יָם הַמֶּלַח lit. Sea of Salt; البحر الميت The first article al- is unnecessary and usually not used.) is a salt lake bordered by Jordan to the east and Israel and Palestine to the west.
Death Valley is a desert valley located in Eastern California, in the northern Mojave Desert bordering the Great Basin Desert.
Deep water source cooling (DWSC) or deep water air cooling is a form of air cooling for process and comfort space cooling which uses a large body of naturally cold water as a heat sink.
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
A depression in geology is a landform sunken or depressed below the surrounding area.
In biology, detritus is dead particulate organic material (as opposed to dissolved organic material).
Dimictic lakes mix from the surface to bottom twice each year.
The Dominican Republic (República Dominicana) is a sovereign state located in the island of Hispaniola, in the Greater Antilles archipelago of the Caribbean region.
A drainage basin is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water.
A dry lake is either a basin or depression that formerly contained a standing surface water body, which disappeared when evaporation processes exceeded recharge.
The Dutch language is a West Germanic language, spoken by around 23 million people as a first language (including the population of the Netherlands where it is the official language, and about sixty percent of Belgium where it is one of the three official languages) and by another 5 million as a second language.
Ecological succession is the process of change in the species structure of an ecological community over time.
Ecology (from οἶκος, "house", or "environment"; -λογία, "study of") is the branch of biology which studies the interactions among organisms and their environment.
An endorheic basin (also endoreic basin or endorreic basin) (from the ἔνδον, éndon, "within" and ῥεῖν, rheîn, "to flow") is a limited drainage basin that normally retains water and allows no outflow to other external bodies of water, such as rivers or oceans, but converges instead into lakes or swamps, permanent or seasonal, that equilibrate through evaporation.
The epilimnion or surface layer is the top-most layer in a thermally stratified lake, occurring above the deeper hypolimnion.
Ethane is an organic chemical compound with chemical formula.
Eutrophication (from Greek eutrophos, "well-nourished"), or hypertrophication, is when a body of water becomes overly enriched with minerals and nutrients that induce excessive growth of plants and algae.
Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gaseous phase before reaching its boiling point.
A fen is one of the main types of wetland, the others being grassy marshes, forested swamps, and peaty bogs.
A finger lake, also known as either a fjord lake or trough lake, is "a narrow linear body of water occupying a glacially overdeepened valley and sometimes impounded by a morainic dam." Where one end of a finger lake is drowned by the sea, it becomes a fjord or sea-loch.
Finland (Suomi; Finland), officially the Republic of Finland is a country in Northern Europe bordering the Baltic Sea, Gulf of Bothnia, and Gulf of Finland, between Norway to the north, Sweden to the northwest, and Russia to the east.
Fish are gill-bearing aquatic craniate animals that lack limbs with digits.
Florida (Spanish for "land of flowers") is the southernmost contiguous state in the United States.
In physics, a force is any interaction that, when unopposed, will change the motion of an object.
A fossil (from Classical Latin fossilis; literally, "obtained by digging") is any preserved remains, impression, or trace of any once-living thing from a past geological age.
Fresh water (or freshwater) is any naturally occurring water except seawater and brackish water.
Galileo was an American unmanned spacecraft that studied the planet Jupiter and its moons, as well as several other Solar System bodies.
Geography (from Greek γεωγραφία, geographia, literally "earth description") is a field of science devoted to the study of the lands, the features, the inhabitants, and the phenomena of Earth.
German (Deutsch) is a West Germanic language that is mainly spoken in Central Europe.
A glacier is a persistent body of dense ice that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries.
In geology, a graben is a depressed block of the Earth's crust bordered by parallel faults.
The Great Bear Lake (Slavey: Sahtú; Grand lac de l'Ours) is the largest lake entirely in Canada (Lake Superior and Lake Huron straddling the Canada–US border are larger), the fourth largest in North America, and the eighth largest in the world.
The Great Lakes (les Grands-Lacs), also called the Laurentian Great Lakes and the Great Lakes of North America, are a series of interconnected freshwater lakes located primarily in the upper mid-east region of North America, on the Canada–United States border, which connect to the Atlantic Ocean through the Saint Lawrence River.
The Great Salt Lake, located in the northern part of the U.S. state of Utah, is the largest salt water lake in the Western Hemisphere, and the eighth-largest terminal lake in the world.
Greater Sudbury, commonly referred to as Sudbury, is a city in Ontario, Canada.
Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations.
In oceanography, a halocline (from Greek hals, halo- ‘salt’ and klinein ‘to slope’) is a subtype of chemocline caused by a strong, vertical salinity gradient within a body of water.
Heat capacity or thermal capacity is a measurable physical quantity equal to the ratio of the heat added to (or removed from) an object to the resulting temperature change.
The hectare (SI symbol: ha) is an SI accepted metric system unit of area equal to a square with 100 meter sides, or 10,000 m2, and is primarily used in the measurement of land.
Holomictic lakes are lakes that have a uniform temperature and density from top to bottom at a specific time during the year, which allows the lake waters to completely mix.
In physical geography and geology, a horst is a raised fault block bounded by normal faults.
Hydroelectricity is electricity produced from hydropower.
Hydrology is the scientific study of the movement, distribution, and quality of water on Earth and other planets, including the water cycle, water resources and environmental watershed sustainability.
The hypolimnion or under lake is the dense, bottom layer of water in a thermally-stratified lake.
An ice age is a period of long-term reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.
An ice shelf is a thick floating platform of ice that forms where a glacier or ice sheet flows down to a coastline and onto the ocean surface.
Icelandic (íslenska) is a North Germanic language, and the language of Iceland.
An impact event is a collision between astronomical objects causing measurable effects.
India (IAST), also called the Republic of India (IAST), is a country in South Asia.
Industry is the production of goods or related services within an economy.
An inorganic compound is typically a chemical compound that lacks C-H bonds, that is, a compound that is not an organic compound, but the distinction is not defined or even of particular interest.
Io (Jupiter I) is the innermost of the four Galilean moons of the planet Jupiter.
Israel, officially the State of Israel, is a country in the Middle East, on the southeastern shore of the Mediterranean Sea and the northern shore of the Red Sea.
Jordan (الْأُرْدُنّ), officially the Hashemite Kingdom of Jordan (المملكة الأردنية الهاشمية), is a sovereign Arab state in Western Asia, on the East Bank of the Jordan River.
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum.
Karst lakes are formed as the result of a collapse of subterranean caves, especially in water-soluble rocks such as limestone, gypsum and dolomite.
Kraken Mare is the largest known body of liquid on the surface of Saturn's moon Titan.
Lag Prau Pulté is a lake at Flims in the canton of Grisons, Switzerland.
A lagoon is a shallow body of water separated from a larger body of water by barrier islands or reefs.
A lahar (from wlahar) is a violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water.
Lake Agassiz was a very large glacial lake in central North America.
Lake Baikal (p; Байгал нуур, Baigal nuur; Байгал нуур, Baigal nuur, etymologically meaning, in Mongolian, "the Nature Lake") is a rift lake in Russia, located in southern Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast.
Beloye (Белое, White) was a small freshwater lake in Nizhny Novgorod Oblast, Russia.
Lake Cerknica (Cerkniško jezero, Zirknitzer See) is an intermittent lake in the southern part of the Cerknica Polje, a karst polje in Inner Carniola, a region in southwestern Slovenia.
A lake ecosystem includes biotic (living) plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions.
Lake El'gygytgyn (Russian and Chukchi: Эльгыгытгын) is an impact crater lake located in the Chukotka Autonomous Okrug in northeast Siberia, about southeast of Chaunskaya Bay.
Lake Enriquillo (Lago Enriquillo) is a hypersaline lake in the Dominican Republic located in the southwestern region of the country.
Lake Eyre, officially known as Kati Thanda–Lake Eyre, contains the lowest natural point in Australia, at approximately below sea level (AHD), and, on the rare occasions that it fills, is the largest lake in Australia covering.
Lake Huron is one of the five Great Lakes of North America.
Lake Ladoga (p or p; Laatokka;; Ladog, Ladoganjärv) is a freshwater lake located in the Republic of Karelia and Leningrad Oblast in northwestern Russia, in the vicinity of Saint Petersburg.
Lake Manitou is the largest lake on Manitoulin Island in Ontario, Canada.
Lake Maracaibo (Lago de Maracaibo) is a large brackish tidal bay (or tidal estuary) in Venezuela and an "inlet of the Caribbean Sea." It is sometimes considered a lake rather than a bay or lagoon.
Lake Michigan is one of the five Great Lakes of North America and the only one located entirely within the United States.
Lake Michigan–Huron (also Huron–Michigan) is the combined waters of Lake Michigan and Lake Huron, which are joined through the wide, 20-fathom (120 ft; 37 m) deep, open-water Straits of Mackinac.
A lake monster is a lake-dwelling entity of mythic origin.
Lake Onega (also known as Onego, p; Ääninen or Äänisjärvi; Oniegu or Oniegu-järve; Änine or Änižjärv) is a lake in the north-west European part of Russia, located on the territory of Republic of Karelia, Leningrad Oblast and Vologda Oblast.
Lake Puma Yumco (Chinese: 普莫雍錯) is a lake located at 5,030 metres (16,503 ft) above mean sea level on the southern Tibetan Plateau.
Lake stratification is the separation of lakes into three layers.
Lake Superior (Lac Supérieur; ᑭᑦᒉᐁ-ᑲᒣᐁ, Gitchi-Gami) is the largest of the Great Lakes of North America.
Lake Tanganyika is an African Great Lake.
Lake Taupo is a lake in the North Island of New Zealand.
Lake Titicaca (Lago Titicaca, Titiqaqa Qucha) is a large, deep lake in the Andes on the border of Bolivia and Peru.
Lake Toba (Danau Toba) is a large natural lake in Indonesia occupying the caldera of a supervolcano.
Lake Victoria (Nam Lolwe in Luo; Nalubaale in Luganda; Nyanza in Kinyarwanda and some Bantu languages) is one of the African Great Lakes.
Lake Vostok (Озеро Восток, Ozero Vostok, lit. "Lake East") is the largest of Antarctica's almost 400 known subglacial lakes.
Lake Wanapitei occupies a meteorite crater in Sudbury, Ontario, Canada.
Lake Winnipeg (Lac Winnipeg) is a very large, but relatively shallow lake in central North America, in the province of Manitoba, Canada.
Lake Winnipegosis is a large (5,370 km²) lake in central North America, in Manitoba, Canada, some 300 km northwest of Winnipeg.
The lakes of Titan, Saturn's largest moon, are bodies of liquid ethane and methane that have been detected by the Cassini–Huygens space probe, and had been suspected long before.
A landslide dam or barrier lake is a natural damming of a river by some kind of landslides, such as debris flows and rock avalanches, or by volcanic eruptions.
Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.
In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface.
Lava is molten rock generated by geothermal energy and expelled through fractures in planetary crust or in an eruption, usually at temperatures from.
Lava lakes are large volumes of molten lava, usually basaltic, contained in a volcanic vent, crater, or broad depression.
Ligeia Mare is a lake in the north polar region of Titan, the planet Saturn's largest moon.
Liman defined in Bulgarian, Ukrainian, Russian (Лиман) and Romanian (liman) the enlarged estuaries formed as lagoons at the widening mouth of one or several rivers, where flow is blocked by a bar of sediments, as the Dniester Liman or the Razelm liman; a liman can be maritime (the bar being created by the current of a sea) or fluvial (the bar being created by the flow of a bigger river at the confluence).
A limnic eruption, also termed a lake overturn, is a rare type of natural disaster in which dissolved carbon dioxide suddenly erupts from deep lake waters, forming a gas cloud capable of suffocating wildlife, livestock, and humans.
Limnology (from Greek λίμνη, limne, "lake" and λόγος, logos, "knowledge"), is the study of inland aquatic ecosystems.
For rank-order lists, see List of lakes by area, List of lakes by depth, List of lakes by volume.
This is a list of terrestrial lakes with a surface area of more than approximately, ranked by area.
This page lists the world's deepest lakes.
This is a list of lakes (including reservoirs) in the United States, grouped by state.
This is a list of lakes of Europe with an average area greater than 100 km².
The littoral zone is the part of a sea, lake or river that is close to the shore.
Loch is the Irish, Scottish Gaelic and Scots word for a lake or for a sea inlet.
Lonar Lake is a notified National Geo-heritage Monument saline soda lake located at Lonar in Buldhana district, Maharashtra, India, which was created by a meteor impact during the Pleistocene Epoch and it is the only known hyper velocity impact crater in basaltic rock anywhere on Earth.
The lunar maria (singular: mare) are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions.
Luzon is the largest and most populous island in the Philippines.
A maar is a broad, low-relief volcanic crater caused by a phreatomagmatic eruption (an explosion which occurs when groundwater comes into contact with hot lava or magma).
Macrocosm and microcosm refers to a vision of cosmos where the part (microcosm) reflects the whole (macrocosm) and vice versa.
Malheur Lake is one of the lakes in the Malheur National Wildlife Refuge in Harney County in the U.S. state of Oregon.
The Malheur River (local pronunciation: "MAL-hyure") is a tributary of the Snake River in eastern Oregon in the United States.
Manitoulin Island is a Canadian lake island in Lake Huron, in the province of Ontario.
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
A marsh is a wetland that is dominated by herbaceous rather than woody plant species.
A meander is one of a series of regular sinuous curves, bends, loops, turns, or windings in the channel of a river, stream, or other watercourse.
Mere in English refers to a lake that is broad in relation to its depth, e.g. Martin Mere.
A meromictic lake has layers of water that do not intermix.
A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon.
Methane is a chemical compound with the chemical formula (one atom of carbon and four atoms of hydrogen).
Middle English (ME) is collectively the varieties of the English language spoken after the Norman Conquest (1066) until the late 15th century; scholarly opinion varies but the Oxford English Dictionary specifies the period of 1150 to 1500.
Middle Low German or Middle Saxon (ISO 639-3 code gml) is a language that is the descendant of Old Saxon and the ancestor of modern Low German.
Monomictic lakes are holomictic lakes that mix from top to bottom during one mixing period each year.
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
Moses Lake is a city in Grant County, Washington, United States.
Mount Mazama (Giiwas in the Native American language Klamath) is a complex volcano in the Oregon segment of the Cascade Volcanic Arc and the Cascade Range, in the United States.
Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium.
Nettilling Lake is a cold freshwater lake located toward the south end of Baffin Island, Nunavut, Canada.
Nizhny Novgorod Oblast (Нижегоро́дская о́бласть, Nizhegorodskaya oblast), also known as Nizhegorod Oblast, is a federal subject of Russia (an oblast).
The Northern Hemisphere is the half of Earth that is north of the Equator.
The Northwest Territories (NT or NWT; French: les Territoires du Nord-Ouest, TNO; Athabaskan languages: Denendeh; Inuinnaqtun: Nunatsiaq; Inuktitut: ᓄᓇᑦᓯᐊᖅ) is a federal territory of Canada.
Nunavut (Inuktitut syllabics ᓄᓇᕗᑦ) is the newest, largest, and northernmost territory of Canada.
A nutrient is a substance used by an organism to survive, grow, and reproduce.
Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons, called shale oil (not to be confused with tight oil—crude oil occurring naturally in shales), can be produced.
Nevado Ojos del Salado is a stratovolcano in the Andes on the Argentina–Chile border and the highest active volcano in the world at.
Oka (Ока́) is a river in central Russia, the largest right tributary of the Volga.
Old English (Ænglisc, Anglisc, Englisc), or Anglo-Saxon, is the earliest historical form of the English language, spoken in England and southern and eastern Scotland in the early Middle Ages.
An oligotroph is an organism that can live in an environment that offers very low levels of nutrients.
Ontario is one of the 13 provinces and territories of Canada and is located in east-central Canada.
Open and closed lakes refer to the major subdivisions of lakes - bodies of water surrounded by land.
Oregon is a state in the Pacific Northwest region on the West Coast of the United States.
Organic matter, organic material, or natural organic matter (NOM) refers to the large pool of carbon-based compounds found within natural and engineered, terrestrial and aquatic environments.
Owens Lake is a mostly dry lake in the Owens Valley on the eastern side of the Sierra Nevada in Inyo County, California.
An oxbow lake is a U-shaped lake that forms when a wide meander from the main stem of a river is cut off, creating a free-standing body of water.
Oxygen saturation (symbol SO2) is a relative measure of the concentration of oxygen that is dissolved or carried in a given medium as a proportion of the maximal concentration that can be dissolved in that medium.
In marine and freshwater ecology, a particle is a small object.
Peat, also called turf, is an accumulation of partially decayed vegetation or organic matter that is unique to natural areas called peatlands, bogs, mires, moors, or muskegs.
Peru (Perú; Piruw Republika; Piruw Suyu), officially the Republic of Peru, is a country in western South America.
Petroleum is a naturally occurring, yellow-to-black liquid found in geological formations beneath the Earth's surface.
In chemistry, pH is a logarithmic scale used to specify the acidity or basicity of an aqueous solution.
The Philippines (Pilipinas or Filipinas), officially the Republic of the Philippines (Republika ng Pilipinas), is a unitary sovereign and archipelagic country in Southeast Asia.
The photic zone, euphotic zone (Greek for "well lit": εὖ "well" + φῶς "light"), or sunlight or (sunlit) zone is the uppermost layer of water in a lake or ocean that is exposed to intense sunlight.
Phragmites is a genus of four species of large perennial grasses found in wetlands throughout temperate and tropical regions of the world.
Piedmont (Piemonte,; Piedmontese, Occitan and Piemont; Piémont) is a region in northwest Italy, one of the 20 regions of the country.
The Pingualuit Crater (Cratère des Pingualuit; from Inuit "pimple"), formerly called the Chubb Crater and later the New Quebec Crater (Cratère du Nouveau-Québec), is a young impact crater, by geological standards, located on the Ungava Peninsula, in the administrative region of Nord-du-Québec, in Quebec, Canada.
A piscivore is a carnivorous animal that eats primarily fish.
Plankton (singular plankter) are the diverse collection of organisms that live in large bodies of water and are unable to swim against a current.
A plunge pool (or plunge basin or waterfall lake) is a deep depression in a stream bed at the base of a waterfall; it is created by the erosional forces of falling water on the rocks at fall's base where the water impacts.
A polje, also karst polje or karst field, is a large flat plain found in karstic geological regions of the world, with areas usually 5 to 400 km².
Polymictic lakes are holomictic lakes that are too shallow to develop thermal stratification; thus, their waters can mix from top to bottom throughout the ice-free period.
A pond is a body of standing water, either natural or artificial, that is usually smaller than a lake.
Human prehistory is the period between the use of the first stone tools 3.3 million years ago by hominins and the invention of writing systems.
The profundal zone is a deep zone of an inland body of freestanding water, such as a lake or pond, located below the range of effective light penetration.
In geology, a proglacial lake is a lake formed either by the damming action of a moraine during the retreat of a melting glacier, a glacial ice dam, or by meltwater trapped against an ice sheet due to isostatic depression of the crust around the ice.
Proto-Germanic (abbreviated PGmc; German: Urgermanisch; also called Common Germanic, German: Gemeingermanisch) is the reconstructed proto-language of the Germanic branch of the Indo-European languages.
Proto-Indo-European (PIE) is the linguistic reconstruction of the hypothetical common ancestor of the Indo-European languages, the most widely spoken language family in the world.
The Qikiqtaaluk Region, Qikiqtani Region (ᕿᑭᖅᑖᓗᒃ) or Baffin Region is the easternmost administrative region of Nunavut, Canada.
Quake Lake (officially Earthquake Lake) is a lake in southwestern Montana in the United States.
Quaternary is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS).
Ramsey Lake is a lake in Sudbury, Ontario, located near the city's downtown core.
Recreation is an activity of leisure, leisure being discretionary time.
In geology, the term relict refers to structures or minerals from a parent rock that did not undergo metamorphic change when the surrounding rock did, or to rock that survived a destructive geologic process.
A rift lake is a lake formed as a result of subsidence related to movement on faults within a rift zone, an area of extensional tectonics in the continental crust.
A rift zone is a feature of some volcanoes, especially shield volcanoes, in which a linear series of cracks (or rifts) develops in a volcanic edifice, typically forming into two or three well-defined regions along the flanks of the vent.
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river.
A river mouth is the part of a river where the river flows into another river, a lake, a reservoir, a sea, or an ocean.
A sag pond is a body of fresh water collected in the lowest parts of a depression formed between two sides of an active strike-slip, transtensional or normal fault zone.
Saline water (more commonly known as salt water) is water that contains a high concentration of dissolved salts (mainly NaCl).
Salinity is the saltiness or amount of salt dissolved in a body of water (see also soil salinity).
Salt, table salt or common salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in its natural form as a crystalline mineral is known as rock salt or halite.
A salt lake or saline lake is a landlocked body of water that has a concentration of salts (typically sodium chloride) and other dissolved minerals significantly higher than most lakes (often defined as at least three grams of salt per litre).
Natural salt pans or salt flats are flat expanses of ground covered with salt and other minerals, usually shining white under the sun.
Sand is a naturally occurring granular material composed of finely divided rock and mineral particles.
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.
A sea breeze or onshore breeze is any wind that blows from a large body of water toward or onto a landmass; it develops due to differences in air pressure created by the differing heat capacities of water and dry land.
Seawater, or salt water, is water from a sea or ocean.
The Secchi disk, as created in 1865 by Angelo Secchi, is a plain white, circular disk in diameter used to measure water transparency or turbidity in bodies of water.
Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice, and/or by the force of gravity acting on the particles.
Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water.
Sevier Lake is an intermittent and endorheic lake which lies in the lowest part of the Sevier Desert, Millard County, Utah.
Shale gas is natural gas that is found trapped within shale formations.
Siberia (a) is an extensive geographical region, and by the broadest definition is also known as North Asia.
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar.
A sinkhole, also known as a cenote, sink, sink-hole, swallet, swallow hole, or doline (the different terms for sinkholes are often used interchangeably), is a depression or hole in the ground caused by some form of collapse of the surface layer.
A slough is a wetland, usually a swamp or shallow lake, often a backwater to a larger body of water.
Slovenia (Slovenija), officially the Republic of Slovenia (Slovene:, abbr.: RS), is a country in southern Central Europe, located at the crossroads of main European cultural and trade routes.
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa.
A spacecraft is a vehicle or machine designed to fly in outer space.
Sphagnum is a genus of approximately 380 accepted species of mosses, commonly known as peat moss.
Palestine (فلسطين), officially the State of Palestine (دولة فلسطين), is a ''de jure'' sovereign state in the Middle East claiming the West Bank (bordering Israel and Jordan) and Gaza Strip (bordering Israel and Egypt) with East Jerusalem as the designated capital, although its administrative center is currently located in Ramallah.
A stream is a body of water with surface water flowing within the bed and banks of a channel.
A subglacial lake is a lake under a glacier, typically an ice cap or ice sheet.
Subsidence is the motion of a surface (usually, the earth's surface) as it shifts downward relative to a datum such as sea level.
Sulfur or sulphur is a chemical element with symbol S and atomic number 16.
Sumatra is an Indonesian island in Southeast Asia that is part of the Sunda Islands.
In chemistry, a suspension is a heterogeneous mixture that contains solid particles sufficiently large for sedimentation.
A swamp is a wetland that is forested.
Taal Lake, formerly known as Bombón Lake, is a freshwater lake in the province of Batangas, on the island of Luzon in the Philippines.
Tanzania, officially the United Republic of Tanzania (Jamhuri ya Muungano wa Tanzania), is a sovereign state in eastern Africa within the African Great Lakes region.
A tarn (or corrie loch) is a mountain lake or pool, formed in a cirque excavated by a glacier.
In geography, the temperate or tepid climates of Earth occur in the middle latitudes, which span between the tropics and the polar regions of Earth.
Temperature is a physical quantity expressing hot and cold.
A thermocline (also known as the thermal layer or the metalimnion in lakes) is a thin but distinct layer in a large body of fluid (e.g. water, such as an ocean or lake) or air (such as an atmosphere) in which temperature changes more rapidly with depth than it does in the layers above or below.
The Tibet Autonomous Region (TAR) or Xizang Autonomous Region, called Tibet or Xizang for short, is a province-level autonomous region of the People's Republic of China (PRC).
Titan is the largest moon of Saturn.
Trophic cascades are powerful indirect interactions that can control entire ecosystems, occurring when predators in a food web suppress the abundance or alter the behavior of their prey, thereby releasing the next lower trophic level from predation (or herbivory if the intermediate trophic level is a herbivore).
Trophic State Index (TSI) is a classification system designed to rate bodies of water based on the amount of biological activity they sustain.
The tropics are a region of the Earth surrounding the Equator.
Turbidity is the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye, similar to smoke in air.
An underground lake or subterranean lake is a lake under the surface of the Earth.
The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
Upper Dumbell Lake is a lake in Qikiqtaaluk Region, Nunavut.
Utah is a state in the western United States.
A varve is an annual layer of sediment or sedimentary rock.
A vlei is a shallow minor lake, mostly of a seasonal or intermittent nature.
A volcanic crater is a roughly circular depression in the ground caused by volcanic activity.
Volcanism is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics and volcanic gases erupt through a break in the surface called a vent.
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
Water pollution is the contamination of water bodies, usually as a result of human activities.
The water table is the upper surface of the zone of saturation.
A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem.
Wollaston Lake is a lake in northeastern Saskatchewan, Canada.
The World Ocean or Global Ocean (colloquially the sea or the ocean) is the interconnected system of Earth's oceanic waters, and comprises the bulk of the hydrosphere, covering (70.8%) of Earth's surface, with a total volume of.
The 1959 Hebgen Lake earthquake also known as the 1959 Yellowstone earthquake occurred on August 17 at 11:37 pm (MST) in southwestern Montana, United States.
Ephemeral lake, Freshwater lake, Inland lake, Intermittent lake, Lacustrine, Lacustrine Ecosystem, Lake beds, Lakes, Natural freshwater lake, Natural lake, Reservoir lake, Seasonal lake, Types of lakes.