113 relations: Acid, Acid rain, African Great Lakes, Amazon River, American Meteorological Society, Aquifer, Aral Sea, Argentina, Atmosphere, Atmosphere of Earth, Bog, Brackish water, Cereal, Chalybeate, Chloride, Concentration, Contractile vacuole, Cortisol, Dairy cattle, Desalination, Desert, Drinking water, Drought, Dust, Earth, Ecosystem, Eel, European eel, Eutrophication, Everglades, Fish, Fish migration, Florida, Freshwater bivalve, Freshwater crab, Freshwater fish, Freshwater mollusc, Freshwater snail, Galápagos Islands, Gill, Glacier, Great Lakes, Groundwater, Hormone, Human, Hyporheic zone, Ice, Ice cap, Ice sheet, Iceberg, ..., Industry, Instream use, Iron, Irrigation, Kidney, Lake, Lake Baikal, Lake ecosystem, Limnology, List of countries by freshwater withdrawal, List of countries by total renewable water resources, Magnesium, Mammal, Marine iguana, Metabolism, Mist, Nitrogen, North Africa, Ocean, Osmosis, Parts-per notation, Petroleum, Pollution, Pond, Practical Fishkeeping, Precipitation, Prolactin, Properties of water, Protist, Rain, Reservoir, River, River ecosystem, Rodent, Royal Dutch Shell, Sahara, Salmon, Salt, Salt (chemistry), Sand, Sanitation, Sea, Seabird, Seawater, Snow, Sodium, Soil, Stream, Streamflow, Sulfate, Sulfur, Surface water, Swamp, Tonicity, Total dissolved solids, United States, United States Geological Survey, Upland and lowland, Water, Water cycle, Water pollution, World Bank, World population. Expand index (63 more) » « Shrink index
An acid is a molecule or ion capable of donating a hydron (proton or hydrogen ion H+), or, alternatively, capable of forming a covalent bond with an electron pair (a Lewis acid).
Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions (low pH).
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.
The Amazon River (or; Spanish and Amazonas) in South America is the largest river by discharge volume of water in the world, and either the longest or second longest.
The American Meteorological Society (AMS) is the premier scientific and professional organization in the United States promoting and disseminating information about the atmospheric, oceanic, and hydrologic sciences. Its mission is to advance the atmospheric and related sciences, technologies, applications, and services for the benefit of society.
An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt).
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.
Argentina, officially the Argentine Republic (República Argentina), is a federal republic located mostly in the southern half of South America.
An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.
A bog is a wetland that accumulates peat, a deposit of dead plant material—often mosses, and in a majority of cases, sphagnum moss.
Brackish water is water that has more salinity than fresh water, but not as much as seawater.
A cereal is any edible components of the grain (botanically, a type of fruit called a caryopsis) of cultivated grass, composed of the endosperm, germ, and bran.
Chalybeate waters, also known as ferruginous waters, are mineral spring waters containing salts of iron.
The chloride ion is the anion (negatively charged ion) Cl−.
In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture.
A contractile vacuole (CV) is a sub-cellular structure (organelle) involved in osmoregulation.
Cortisol is a steroid hormone, in the glucocorticoid class of hormones.
Dairy cattle (also called dairy cows) are cattle cows bred for the ability to produce large quantities of milk, from which dairy products are made.
Desalination is a process that extracts mineral components from saline water.
A desert is a barren area of landscape where little precipitation occurs and consequently living conditions are hostile for plant and animal life.
Drinking water, also known as potable water, is water that is safe to drink or to use for food preparation.
A drought is a period of below-average precipitation in a given region, resulting in prolonged shortages in the water supply, whether atmospheric, surface water or ground water.
Dust are fine particles of matter.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
An ecosystem is a community made up of living organisms and nonliving components such as air, water, and mineral soil.
An eel is any ray-finned fish belonging to the order Anguilliformes, which consists of four suborders, 20 families, 111 genera and about 800 species.
The European eel (Anguilla anguilla) is a species of eel, a snake-like, catadromous fish.
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.
The Everglades is a natural region of tropical wetlands in the southern portion of the U.S. state of Florida, comprising the southern half of a large drainage basin and part of the neotropic ecozone.
Fish are gill-bearing aquatic craniate animals that lack limbs with digits.
Many types of fish migrate on a regular basis, on time scales ranging from daily to annually or longer, and over distances ranging from a few metres to thousands of kilometres.
Florida (Spanish for "land of flowers") is the southernmost contiguous state in the United States.
Freshwater bivalves are one kind of freshwater molluscs, along with freshwater snails.
There are around 1,300 species of freshwater crabs, distributed throughout the tropics and subtropics, divided among eight families.
Freshwater fish are those that spend some or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 0.05%.
Freshwater molluscs are those members of the Phylum Mollusca which live in freshwater habitats, both lotic (flowing water) such as rivers, streams, canals, springs, and cave streams (stygobite species) and lentic (still water) such as lakes, ponds (including temporary or vernal ponds), and ditches.
Freshwater snails are gastropod mollusks which live in freshwater.
The Galápagos Islands (official name: Archipiélago de Colón, other Spanish name: Las Islas Galápagos), part of the Republic of Ecuador, are an archipelago of volcanic islands distributed on either side of the equator in the Pacific Ocean surrounding the centre of the Western Hemisphere, west of continental Ecuador.
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water and excretes carbon dioxide.
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.
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.
Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations.
A hormone (from the Greek participle “ὁρμῶ”, "to set in motion, urge on") is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour.
Humans (taxonomically Homo sapiens) are the only extant members of the subtribe Hominina.
The hyporheic zone is a region beneath and alongside a stream bed, where there is mixing of shallow groundwater and surface water.
Ice is water frozen into a solid state.
An ice cap is a mass of ice that covers less than 50,000 km2 of land area (usually covering a highland area).
An ice sheet is a mass of glacier ice that covers surrounding terrain and is greater than, this is also known as continental glacier.
An iceberg or ice mountain is a large piece of freshwater ice that has broken off a glacier or an ice shelf and is floating freely in open water.
Industry is the production of goods or related services within an economy.
Instream use refers to water use taking place within a stream channel.
Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.
Irrigation is the application of controlled amounts of water to plants at needed intervals.
The kidneys are two bean-shaped organs present in left and right sides of the body in vertebrates.
A lake is an area filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake.
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.
A lake ecosystem includes biotic (living) plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions.
Limnology (from Greek λίμνη, limne, "lake" and λόγος, logos, "knowledge"), is the study of inland aquatic ecosystems.
This is a list of countries by freshwater withdrawal mostly based on The World Factbook, accessed in June 2008.
This is a list of countries by total renewable water resources mostly based on The World Factbook.
Magnesium is a chemical element with symbol Mg and atomic number 12.
Mammals are the vertebrates within the class Mammalia (from Latin mamma "breast"), a clade of endothermic amniotes distinguished from reptiles (including birds) by the possession of a neocortex (a region of the brain), hair, three middle ear bones, and mammary glands.
The marine iguana (Amblyrhynchus cristatus), also known as the Galápagos marine iguana, is a species of iguana found only on the Galápagos Islands (Ecuador) that has the ability, unique among modern lizards, to forage in the sea, making it a marine reptile.
Metabolism (from μεταβολή metabolē, "change") is the set of life-sustaining chemical transformations within the cells of organisms.
Mist is a phenomenon caused by small droplets of water suspended in air.
Nitrogen is a chemical element with symbol N and atomic number 7.
North Africa is a collective term for a group of Mediterranean countries and territories situated in the northern-most region of the African continent.
An ocean (the sea of classical antiquity) is a body of saline water that composes much of a planet's hydrosphere.
Osmosis is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides.
In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction.
Petroleum is a naturally occurring, yellow-to-black liquid found in geological formations beneath the Earth's surface.
Pollution is the introduction of contaminants into the natural environment that cause adverse change.
A pond is a body of standing water, either natural or artificial, that is usually smaller than a lake.
Practical Fishkeeping (also known as PFK) is a United Kingdom-based aquarium magazine.
In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls under gravity.
Prolactin (PRL), also known as luteotropic hormone or luteotropin, is a protein that is best known for its role in enabling mammals, usually females, to produce milk.
Water is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, which is nearly colorless apart from an inherent hint of blue. It is by far the most studied chemical compound and is described as the "universal solvent" and the "solvent of life". It is the most abundant substance on Earth and the only common substance to exist as a solid, liquid, and gas on Earth's surface. It is also the third most abundant molecule in the universe. Water molecules form hydrogen bonds with each other and are strongly polar. This polarity allows it to separate ions in salts and strongly bond to other polar substances such as alcohols and acids, thus dissolving them. Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity. Water is amphoteric, meaning that it is both an acid and a base—it produces + and - ions by self-ionization.
A protist is any eukaryotic organism that has cells with nuclei and is not an animal, plant or fungus.
Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then becomes heavy enough to fall under gravity.
A reservoir (from French réservoir – a "tank") is a storage space for fluids.
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river.
The ecosystem of a river is the river viewed as a system operating in its natural environment, and includes biotic (living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions.
Rodents (from Latin rodere, "to gnaw") are mammals of the order Rodentia, which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws.
Royal Dutch Shell plc, commonly known as Shell, is a British–Dutch multinational oil and gas company headquartered in the Netherlands and incorporated in the United Kingdom.
The Sahara (الصحراء الكبرى,, 'the Great Desert') is the largest hot desert and the third largest desert in the world after Antarctica and the Arctic.
Salmon is the common name for several species of ray-finned fish in the family Salmonidae.
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.
In chemistry, a salt is an ionic compound that can be formed by the neutralization reaction of an acid and a base.
Sand is a naturally occurring granular material composed of finely divided rock and mineral particles.
Sanitation refers to public health conditions related to clean drinking water and adequate treatment and disposal of human excreta and sewage.
A sea is a large body of salt water that is surrounded in whole or in part by land.
Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment.
Seawater, or salt water, is water from a sea or ocean.
Snow refers to forms of ice crystals that precipitate from the atmosphere (usually from clouds) and undergo changes on the Earth's surface.
Sodium is a chemical element with symbol Na (from Latin natrium) and atomic number 11.
Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life.
A stream is a body of water with surface water flowing within the bed and banks of a channel.
Streamflow, or channel runoff, is the flow of water in streams, rivers, and other channels, and is a major element of the water cycle.
The sulfate or sulphate (see spelling differences) ion is a polyatomic anion with the empirical formula.
Sulfur or sulphur is a chemical element with symbol S and atomic number 16.
Surface water is water on the surface of the planet such as in a river, lake, wetland, or ocean.
A swamp is a wetland that is forested.
Tonicity is a measure of the effective osmotic pressure gradient, as defined by the water potential of two solutions separated by a semipermeable membrane.
Total dissolved solids (TDS) is a measure of the combined content of all inorganic and organic substances contained in a liquid in molecular, ionized or micro-granular (colloidal sol) suspended form.
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.
The United States Geological Survey (USGS, formerly simply Geological Survey) is a scientific agency of the United States government.
Upland and lowland are conditional descriptions of a plain based on elevation above sea level.
Water is a transparent, tasteless, odorless, and nearly colorless chemical substance that is the main constituent of Earth's streams, lakes, and oceans, and the fluids of most living organisms.
The water cycle, also known as the hydrological cycle or the hydrologic cycle, describes the continuous movement of water on, above and below the surface of the Earth.
Water pollution is the contamination of water bodies, usually as a result of human activities.
The World Bank (Banque mondiale) is an international financial institution that provides loans to countries of the world for capital projects.
In demographics, the world population is the total number of humans currently living, and was estimated to have reached 7.6 billion people as of May 2018.