Citizendia

This article is about the chemical substance. For its chemical and physical properties, see water (molecule). Water ( H2[[oxygen O]] H OH) is the most abundant Molecule on Earth 's surface composing of about 70% of the Earth's surface as For other uses, see Water (disambiguation).
Water in three states: liquid, solid (ice), and (invisible) vapor in air. Clouds are droplets of liquid, condensed from water vapor.
Water in three states: liquid, solid (ice), and (invisible) vapor in air. Ice is a Solid phase, usually crystalline, of a Non-metalic substance that is liquid or gas at Room temperature, such as Ammonia Clouds are droplets of liquid, condensed from water vapor. A cloud is a visible mass of droplets or frozen crystals floating in the atmosphere above the surface of the Earth or another Planetary body Condensation is the change of the physical state of aggregation (or simply state of matter from gaseous phase into liquid phase General properties of water vapor Evaporation/sublimation Whenever a water molecule leaves a surface it is said to have evaporated

Water is a common chemical substance that is essential for the survival of all known forms of life. A chemical substance is a Material with a definite chemical composition. Life is a state that distinguishes Organisms from non-living objects such as non-life and dead organisms being manifested by growth through Metabolism In typical usage, water refers only to its liquid form or state, but the substance also has a solid state, ice, and a gaseous state, water vapor. Liquid is one of the principal States of matter. A liquid is a Fluid that has the particles loose and can freely form a distinct surface at the boundaries of A state of matter (or physical state, or form of matter) has physical properties which are qualitatively different from other states of matter A solid' object is in the States of matter characterized by resistance to Deformation and changes of Volume. Ice is a Solid phase, usually crystalline, of a Non-metalic substance that is liquid or gas at Room temperature, such as Ammonia This page is about the physical properties of gas as a state of matter General properties of water vapor Evaporation/sublimation Whenever a water molecule leaves a surface it is said to have evaporated About 1. 460 petatonnes (Pt) of water covers 71% of the Earth's surface, mostly in oceans and other large water bodies, with 1. This article is about the tonne or metric ton For other tons see Ton. EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 6% of water below ground in aquifers and 0. An aquifer is an underground layer of Water -bearing Permeable rock or unconsolidated materials ( Gravel, Sand, Silt, or Clay 001% in the air as vapor, clouds (formed of solid and liquid water particles suspended in air), and precipitation. An atmosphere (from Greek ατμός - atmos, " Vapor " + σφαίρα - sphaira, " Sphere " A vapor or vapour (see Spelling differences) is a substance in the Gas phase at a Temperature lower than its Critical temperature A cloud is a visible mass of droplets or frozen crystals floating in the atmosphere above the surface of the Earth or another Planetary body In Meteorology, precipitation (also known as one class of hydrometeors, which are atmospheric water phenomena is any product of the condensation of atmospheric [1] Saltwater oceans hold 97% of surface water, glaciers and polar ice caps 2. Seawater is Water from a Sea or Ocean. On average seawater in the world's oceans has a Salinity of about 3 An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. "Glacial" and "Glaciation" redirect here For the geological periods see Glacial period. An ice cap is an Ice mass that covers less than 50 000 km² of land area (usually covering a highland area 4%, and other land surface water such as rivers, lakes and ponds 0. "Riverine" redirects here For the use of that term in Maritime geography, see there A lake (from Latin lacus) is a Terrain feature (or Physical feature) a body of Liquid on the surface of a world that is localized to the A pond is a body of water smaller than a Lake, both being examples of Terrain features Although the term pond is universally used to describe waterbodies that 6%. Some of the Earth's water is contained within water towers, biological bodies, manufactured products, and food stores. A water tower, watershed, or elevated water tower is a large elevated water storage container Other water is trapped in ice caps, glaciers, aquifers, or in lakes, sometimes providing fresh water for life on land.

Water moves continually through a cycle of evaporation or transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. The Earth 's Water is always in movement and the water cycle, also known as the hydrologic cycle, describes the continuous movement of water on above Evaporation is the process by which Molecules in a Liquid state (e Transpiration is the Evaporation of water from the aerial parts of Plants especially leaves but also stems Flowers and Roots Evapotranspiration (ET is a term used to describe the sum of Evaporation and Plant Transpiration from the earth's land surface to Atmosphere Surface runoff is a term used to describe when soil is infiltrated to full capacity and excess Water, from Rain, Snowmelt, or other sources flows This article is about the body of water For other uses see SEA and Seas. Winds carry water vapor over land at the same rate as runoff into the sea, about 36 Tt per year. Over land, evaporation and transpiration contribute another 71 Tt per year to the precipitation of 107 Tt per year over land. Clean, fresh drinking water is essential to human and other life. Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not Human beings, humans or man (Origin 1590–1600 L homō man OL hemō the earthly one (see Humus However, in many parts of the world - especially developing countries - there is a water crisis, and it is estimated that by 2025 more than half of the world population will be facing water-based vulnerability. Third World is a name given to nations that are generally considered to be underdeveloped economically Water Crisis is a term that refers to the status of the world’s Water resources relative to human demand The world population is the total number of living Humans on Earth at a given time [2] Water plays an important role in the world economy, as it functions as a solvent for a wide variety of chemical substances and facilitates industrial cooling and transportation. The world economy can be evaluated in various ways depending on the model used and this valuation can then be represented in various ways (for example in 2006 US dollars) A solvent is a liquid or gas that dissolves a solid liquid or gaseous Solute, resulting in a Solution. Approximately 70% of freshwater is consumed by agriculture. Freshwater is a word that refers to bodies of water such as Ponds lakes rivers and streams containing low concentrations of dissolved Salts and other Total dissolved Agriculture refers to the production of goods through the growing of plants and fungi and the raising of domesticated Animals The study of agriculture [3]

Contents

Types of water

Liquid water in motion
Liquid water in motion

Water can appear in three phases. In the Physical sciences a phase is a Set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties Water takes many different forms on Earth: water vapor and clouds in the sky; seawater and rarely icebergs in the ocean; glaciers and rivers in the mountains; and aquifers in the ground. EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 General properties of water vapor Evaporation/sublimation Whenever a water molecule leaves a surface it is said to have evaporated A cloud is a visible mass of droplets or frozen crystals floating in the atmosphere above the surface of the Earth or another Planetary body Seawater is Water from a Sea or Ocean. On average seawater in the world's oceans has a Salinity of about 3 An iceberg is a large piece of freshwater Ice that has broken off from a snow-formed Glacier or Ice shelf and is floating in open water "Glacial" and "Glaciation" redirect here For the geological periods see Glacial period. "Riverine" redirects here For the use of that term in Maritime geography, see there A mountain is a Landform that extends above the surrounding Terrain in a limited area with a peak

Water can dissolve many different substances, giving it different tastes and odors. In fact, humans and other animals have developed senses to be able to evaluate the potability of water: animals generally dislike the taste of salty sea water and the putrid swamps and favor the purer water of a mountain spring or aquifer. Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not Salt is a Dietary mineral composed primarily of Sodium chloride that is essential for Animal life but toxic to most land plants Seawater is Water from a Sea or Ocean. On average seawater in the world's oceans has a Salinity of about 3 A swamp is a Wetland featuring temporary or permanent inundation of large areas of land by shallow bodies of water Humans also tend to prefer cold water rather than lukewarm, as cold water is likely to contain fewer microbes. A microorganism (also spelled micro organism or micro-organism and also called a microbe) is an Organism that is Microscopic (usually The taste advertised in spring water or mineral water derives from the minerals dissolved in it, as pure H2O is tasteless. A spring is a point where Groundwater flows out of the ground and is thus where the Aquifer surface meets the ground surface In many places mineral water is often colloquially used to mean Carbonated water (which is usually carbonated mineral water as opposed to tap water As such, purity in spring and mineral water refers to purity from toxins, pollutants, and microbes. A toxin ( Greek:, toxikon, lit (poison for use on arrows is a Poisonous substance produced by living cells or organisms that is active at very low Pollution is the introduction of contaminants into an environment that causes instability disorder harm or discomfort to the physical systems or living organisms they are in A microorganism (also spelled micro organism or micro-organism and also called a microbe) is an Organism that is Microscopic (usually

Different names are given to water's various forms:

Snowflakes by Wilson Bentley, 1902
Snowflakes by Wilson Bentley, 1902
     precipitation according to moves  precipitation according to phase
   

Chemical and physical properties

Water
The dimensions and geometric structure of a water moleculeThis space-filled model shows the molecular structure of water.

Water is a necessary solvent for all known life, and
an abundant compound on the earth's surface. Tritiated water is a form of water where the usual hydrogen atoms are replaced with Tritium. Microbiology (from Greek grc μῑκρος mīkros, "small" grc βίος bios, " Life " and grc -λογία Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not Distinguish from Wastwater (a lake in the Lake District in northwest England Stormwater is a term used to describe water that originates during precipitation events For Water masses on the surface of the world ocean see Surface water (ocean. Holy water can also refer to water that has been blessed, such as by a Priest, and is considered Holy. Water ( H2[[oxygen O]] H OH) is the most abundant Molecule on Earth 's surface composing of about 70% of the Earth's surface as A solvent is a liquid or gas that dissolves a solid liquid or gaseous Solute, resulting in a Solution. A chemical compound is a substance consisting of two or more different elements chemically bonded together in a fixed proportion by Mass.

Information and properties
Common namewater
IUPAC nameoxidane
Alternative namesaqua, dihydrogen monoxide,
hydrogen hydroxide, (more)
Molecular formulaH2O
CAS number7732-18-5
InChIInChI=1/H2O/h1H2
Molar mass18. For Wikipedia aspects see WikipediaNaming conventions (common names, WikipediaNaming conventions, and WikipediaStyle manual. IUPAC Nomenclature is a system of naming Chemical compounds and of describing the science of Chemistry in general "Dihydrogen monoxide" redirects here For the H2O molecule see Water (molecule. A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to The IUPAC International Chemical Identifier ( InChI, pronounced "INchee" is a textual Identifier for Chemical substances designed to provide a Molar mass, symbol M, is the Mass of one mole of a substance ( Chemical element or Chemical compound) 0153 g/mol
Density and phase0. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different In the Physical sciences a phase is a Set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties 998 g/cm³ (liquid at 20 °C, 1 atm)
0. 917 g/cm³ (solid at 0 °C, 1 atm)
Melting point0 °C (273. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. The Celsius Temperature scale was previously known as the centigrade scale. 15 K) (32 °F)
Boiling point99. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic Fahrenheit is a temperature scale named after Daniel Gabriel Fahrenheit (1686–1736 a German Physicist who proposed it in 1724 The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid 974 °C (373. 124 K) (211. 95 °F)
Specific heat capacity4. Specific heat capacity, also known simply as specific heat, is the measure of the heat energy required to increase the Temperature of a unit quantity 184 J/(g·K) (liquid at 20 °C)
Supplementary data page
Disclaimer and references
Main article: Water (molecule)
model of hydrogen bonds between molecules of water
model of hydrogen bonds between molecules of water
Impact from a water drop causes an upward "rebound" jet surrounded by circular capillary waves.
Impact from a water drop causes an upward "rebound" jet surrounded by circular capillary waves. This page provides supplementary chemical data on water. Structure and properties Water ( H2[[oxygen O]] H OH) is the most abundant Molecule on Earth 's surface composing of about 70% of the Earth's surface as A hydrogen bond results from a Dipole-dipole force between an Electronegative atom and a Hydrogen atom bonded to Nitrogen, Oxygen A capillary wave is a Wave travelling along the interface between two fluids whose dynamics are dominated by the effects of Surface tension.
Dew drops adhering to a spider web
Dew drops adhering to a spider web
capillary action of water compared to mercury
capillary action of water compared to mercury

Water is the chemical substance with chemical formula H2O: one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. Formation Water will condense into droplets depending on the temperature Mercury (ˈmɜrkjʊri also called quicksilver or hydrargyrum, is a Chemical element with the symbol Hg ( Latinized hydrargyrum A chemical substance is a Material with a definite chemical composition. A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the In Chemistry, a molecule is defined as a sufficiently stable electrically neutral group of at least two Atoms in a definite arrangement held together by Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 History See also Atomic theory, Atomism The concept that matter is composed of discrete units and cannot be divided into arbitrarily tiny A chemical bond is the physical process responsible for the attractive interactions between Atoms and Molecules and which confers stability to diatomic and polyatomic Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the

The major chemical and physical properties of water are:

ADR label for transporting goods dangerously reactive with water
ADR label for transporting goods dangerously reactive with water

Distribution of water in nature

Water in the Universe

Much of the universe's water may be produced as a byproduct of star formation. Star Formation is the process by which dense parts of Molecular clouds collapse into a ball of plasma to form a Star. When stars are born, their birth is accompanied by a strong outward wind of gas and dust. When this outflow of material eventually impacts the surrounding gas, the shock waves that are created compress and heat the gas. The water observed is quickly produced in this warm dense gas. [6]

Water has been detected in interstellar clouds within our galaxy, the Milky Way. Interstellar cloud is the generic name given to an accumulation of gas plasma and dust in our and other galaxies. A galaxy is a massive gravitationally bound system consisting of Stars an Interstellar medium of gas and dust, and Dark matter The Milky Way (a translation of the Latin Via Lactea, in turn derived from the Greek Γαλαξίας (Galaxias sometimes referred to simply It is believed that water exists in abundance in other galaxies too, because its components, hydrogen and oxygen, are among the most abundant elements in the universe. Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the Interstellar clouds eventually condense into solar nebulae and solar systems, such as ours. The formation and evolution of the Solar System is estimated to have begun The Solar System consists of the Sun and those celestial objects bound to it by Gravity.

Water vapor is on:

Liquid water is on:

Strong evidence suggests that liquid water is present just under the surface of Saturn's moon Enceladus. TemplateInfobox Planet.--> This article is about the moon of Probably some liquid water is on Europa. TemplateInfobox Planet.--> Europa (jʊˈroʊpə; or as

Water ice is on:

Probability or possibility of distribution of water ice is at: lunar ice on the Moon, Ceres (dwarf planet), Tethys (moon). An ice sheet is a mass of Glacier Ice that covers surrounding terrain and is greater than 50000 km² (20000 mile²) TemplateInfobox Planet.--> Titan (ˈtaɪtən, or as TemplateInfobox Planet.--> Europa (jʊˈroʊpə; or as TemplateInfobox Planet.--> This article is about the moon of Lunar ice is water ice that is hypothesised to exist on the surface of the Moon, delivered over geological timescales by the regular bombardment of the Moon by Ceres (ˈsɪəriːz TemplateInfobox Planet.--> Tethys (ˈtiːθɨs, /ˈtɛθɨs/, or Ice is probably in internal structure of Uranus, Neptune, and Pluto and on comets. Neptune ( English|AmE] ] is the eighth and farthest Planet from the Sun in the Solar System. A comet is a small Solar System body that orbits the Sun and when close enough to the Sun exhibits a visible coma (atmosphere or a tail —

Water and habitable zone

The Solar System along center row range of possible habitable zones of varying size stars.
The Solar System along center row range of possible habitable zones of varying size stars. The Solar System consists of the Sun and those celestial objects bound to it by Gravity. In Astronomy a habitable zone ( HZ) is a region of space where conditions are favorable for Life as it may be found on Earth.

The existence of liquid water, and to a lesser extent its gaseous and solid forms, on Earth is vital to the existence of life on Earth as we know it. The Earth is located in the habitable zone of the solar system; if it were slightly closer to or further from the Sun (about 5%, or 8 million kilometres or so), the conditions which allow the three forms to be present simultaneously would be far less likely to exist. In Astronomy a habitable zone ( HZ) is a region of space where conditions are favorable for Life as it may be found on Earth. The Solar System consists of the Sun and those celestial objects bound to it by Gravity. The Sun (Sol is the Star at the center of the Solar System. [9]

Earth's mass allows gravity to hold an atmosphere. Gravitation is a natural Phenomenon by which objects with Mass attract one another An atmosphere (from Greek ατμός - atmos, " Vapor " + σφαίρα - sphaira, " Sphere " Water vapor and carbon dioxide in the atmosphere provide a greenhouse effect which helps maintain a relatively steady surface temperature. The Greenhouse effect refers to the change in the Thermal equilibrium temperature of a planet or moon by the presence of an Atmosphere containing gas that absorbs If Earth were smaller, a thinner atmosphere would cause temperature extremes preventing the accumulation of water except in polar ice caps (as on Mars). A polar ice cap is a high- Latitude region of a Planet or moon that is covered in Ice.

It has been proposed that life itself may maintain the conditions that have allowed its continued existence. The surface temperature of Earth has been relatively constant through geologic time despite varying levels of incoming solar radiation (insolation), indicating that a dynamic process governs Earth's temperature via a combination of greenhouse gases and surface or atmospheric albedo. The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other Insolation is a measure of Solar radiation energy received on a given surface area in a given time The albedo of an object is the extent to which it diffusely reflects light from the sun This proposal is known as the Gaia hypothesis. The Gaia hypothesis is an ecological Hypothesis proposing that the Biosphere and the physical components of the Earth ( Atmosphere

The state of water also depends on a planet's gravity. If a planet is sufficiently massive, the water on it may be solid even at high temperatures, because of the high pressure caused by gravity.

There are various theories about origin of water on Earth. The question of the origin of water on Earth, or more accurately put the question of why there is clearly more Water on the Earth than on the other planets of the Solar

Water on Earth

Main articles: Hydrology and Water distribution on Earth
Water covers 71% of the Earth's surface; the oceans contain 97.2% of the Earth's water. The Antarctic ice sheet, which contains 90% of all fresh water on Earth, is visible at the bottom. Condensed atmospheric water can be seen as clouds, contributing to the Earth's albedo.
Water covers 71% of the Earth's surface; the oceans contain 97. Hydrology (from Greek Yδωρ hudōr, "water" and λόγος logos, "study" is the study of the movement distribution and quality of This article is an overview of the distribution of Water on Earth. An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. 2% of the Earth's water. The Antarctic ice sheet, which contains 90% of all fresh water on Earth, is visible at the bottom. The Antarctic ice sheet is one of the two Polar ice caps of the Earth. Condensed atmospheric water can be seen as clouds, contributing to the Earth's albedo. A cloud is a visible mass of droplets or frozen crystals floating in the atmosphere above the surface of the Earth or another Planetary body The albedo of an object is the extent to which it diffusely reflects light from the sun

Hydrology is the study of the movement, distribution, and quality of water throughout the Earth. The study of the distribution of water is hydrography. Hydrography focuses on the measurement of physical characteristics of Waters and marginal land The study of the distribution and movement of groundwater is hydrogeology, of glaciers is glaciology, of inland waters is limnology and distribution of oceans is oceanography. Hydrogeology ( hydro- meaning water and -geology meaning the study of the Earth) is the area of Geology that deals with the distribution and Glaciology (from Middle French dialect (Franco-Provençal glace, "ice" or Latin glacies, "frost ice" and Greek λόγος Limnology (from Greek Λίμνη limne, "lake" and λόγος logos, "knowledge" is the division of Hydrology that studies inland Oceanography (from the greek words Ωκεανός meaning Ocean and γράφω meaning to write also called oceanology or Ecological processes with hydrology are in focus of ecohydrology. Ecohydrology (from Greek grc οἶκος oikos, "house(hold" grc ὕδωρ hydōr, "water" and grc -λογία -logia

The collective mass of water found on, under, and over the surface of a planet is called hydrosphere. A hydrosphere (from Greek ύδωρ - hydor, " Water " + σφαίρα - sphaira, " Sphere " Earth's approximate water volume (the total water supply of the world) is 1 360 000 000 km³ (326 000 000 mi³). Of this volume:

Groundwater and fresh water are useful or potentially useful to humans as water resources. Water resources are sources of Water that are useful or potentially useful to Humans Uses of water include Agricultural, industrial, Household

Liquid water is found in bodies of water, such as an ocean, sea, lake, river, stream, canal, pond, or puddle. An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. This article is about the body of water For other uses see SEA and Seas. A lake (from Latin lacus) is a Terrain feature (or Physical feature) a body of Liquid on the surface of a world that is localized to the "Riverine" redirects here For the use of that term in Maritime geography, see there A stream is a body of Water with a current, confined within a bed and stream-banks Canals are artificial channels for water There are two types of canals water conveyance canals which are used for the conveyance and delivery of water and Waterways A pond is a body of water smaller than a Lake, both being examples of Terrain features Although the term pond is universally used to describe waterbodies that A puddle is a small accumulation of Liquid, usually Water, on a surface The majority of water on Earth is sea water. Seawater is Water from a Sea or Ocean. On average seawater in the world's oceans has a Salinity of about 3 Water is also present in the atmosphere in solid, liquid, and vapor phases. It also exists as groundwater in aquifers. An aquifer is an underground layer of Water -bearing Permeable rock or unconsolidated materials ( Gravel, Sand, Silt, or Clay

The most important geological processes caused by water are: chemical weathering, water erosion, water sediment transport and sedimentation, mudflows, ice erosion and sedimentation by glacier. Weathering is the decomposition of earth rocks, Soils and their Minerals through direct contact with the planet's Atmosphere. Erosion is the carrying away or displacement of solids ( Sediment, Soil, rock and other particles usually by the agents of currents such as wind Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of Mudslide redirects here it is also the name of a cocktail. A mudflow or mudslide is the most rapid (up to 80 km/h / 50 mph Erosion is the carrying away or displacement of solids ( Sediment, Soil, rock and other particles usually by the agents of currents such as wind

Water cycle

Main article: Water cycle
water cycle
water cycle

The water cycle (known scientifically as the hydrologic cycle) refers to the continuous exchange of water within the hydrosphere, between the atmosphere, soil water, surface water, groundwater, and plants. The Earth 's Water is always in movement and the water cycle, also known as the hydrologic cycle, describes the continuous movement of water on above The Earth 's Water is always in movement and the water cycle, also known as the hydrologic cycle, describes the continuous movement of water on above The Earth 's Water is always in movement and the water cycle, also known as the hydrologic cycle, describes the continuous movement of water on above A hydrosphere (from Greek ύδωρ - hydor, " Water " + σφαίρα - sphaira, " Sphere " Temperature and layers The temperature of the Earth's atmosphere varies with altitude the mathematical relationship between temperature and altitude varies among five Soil, often typeset as SOiL, is a four piece rock band from Chicago Illinois United States founded by Shaun Glass Tom Schofield Tim King and Adam Zadel For Water masses on the surface of the world ocean see Surface water (ocean. Groundwater is Water located beneath the Ground surface in Soil pore spaces and in the Fractures of lithologic formations Plants are living Organisms belonging to the kingdom Plantae.

Water moves perpetually through each of these regions in the water cycle consisting of following transfer processes:

Most water vapor over the oceans returns to the oceans, but winds carry water vapor over land at the same rate as runoff into the sea, about 36 Tt per year. This article is about the tonne or metric ton For other tons see Ton. Over land, evaporation and transpiration contribute another 71 Tt per year. Precipitation, at a rate of 107 Tt per year over land, has several forms: most commonly rain, snow, and hail, with some contribution from fog and dew. Rain is Liquid precipitation. On Earth it is the condensation of atmospheric Water vapor into drops heavy enough to fall often making it to "Snowfall" redirects here For other uses see Snow (disambiguation or Snowfall (disambiguation. Hail is a form of precipitation which consists of balls or irregular lumps of ice (hailstones Fog is a cloud that is in contact with the ground Stratus clouds are usually the only clouds that touch the ground Formation Water will condense into droplets depending on the temperature Condensed water in the air may also refract sunlight to produce rainbows. Refraction is the change in direction of a Wave due to a change in its Speed. Sunlight, in the broad sense is the total spectrum of the Electromagnetic radiation given off by the Sun. A rainbow is an optical and meteorological phenomenon that causes a spectrum of Light to appear in the Sky when the Sun

Water runoff often collects over watersheds flowing into rivers. A drainage basin is an extent of Land where Water from Rain or Snow melt drains downhill into a body of water such as a River, A mathematical model used to simulate river or stream flow and calculate water quality parameters is hydrological transport model. An hydrological transport model is a Mathematical model used to simulate river or Stream flow and calculate water quality parameters Some of water is diverted to irrigation for agriculture. Irrigation is an artificial application of water to the soil usually for assisting in growing crops Rivers and seas offer opportunity for travel and commerce. Travel is the change in location of people on a trip through the means of Transport from one location to another Commerce is a division of trade or production which deals with the exchange of goods and services from producer to final consumer Through erosion, runoff shapes the environment creating river valleys and deltas which provide rich soil and level ground for the establishment of population centers. Erosion is the carrying away or displacement of solids ( Sediment, Soil, rock and other particles usually by the agents of currents such as wind In Geology, a valley (also called a vale, dale, glen or strath and near or in Appalachia, a draw) is A delta is a Landform where the mouth of a River flows into an Ocean, Sea, Estuary, Lake or another river A flood occurs when an area of land, usually low-lying, is covered with water. A flood is an overflow of an expanse of water that submerges land a deluge It is when a river overflows its banks or flood from the sea. A drought is an extended period of months or years when a region notes a deficiency in its water supply. A drought is an extended period of months or years when a region notes a deficiency in its water supply This occurs when a region receives consistently below average precipitation.

Fresh water storage

Main article: Water resources

Some runoff water is trapped for periods, for example in lakes. Water resources are sources of Water that are useful or potentially useful to Humans Uses of water include Agricultural, industrial, Household At high altitude, during winter, and in the far north and south, snow collects in ice caps, snow pack and glaciers. Water also infiltrates the ground and goes into aquifers. This groundwater later flows back to the surface in springs, or more spectacularly in hot springs and geysers. Groundwater is Water located beneath the Ground surface in Soil pore spaces and in the Fractures of lithologic formations A spring is a point where Groundwater flows out of the ground and is thus where the Aquifer surface meets the ground surface A hot spring is a spring that is produced by the emergence of geothermally heated Groundwater from the earth's crust. A geyser is a Hot spring characterized by intermittent discharge of water ejected turbulently and accomplished by a vapour phase Groundwater is also extracted artificially in wells. This water storage is important, since clean, fresh water is essential to human and other land-based life. Human beings, humans or man (Origin 1590–1600 L homō man OL hemō the earthly one (see Humus In many parts of the world, it is in short supply.

Tides

High tide (left) and low tide (right).
Main article: Tide

Tides are the cyclic rising and falling of Earth's ocean surface caused by the tidal forces of the Moon and the Sun acting on the oceans. Characteristics A tide is a repeated cycle of sea level changes in the following stages Over several hours the water rises or advances up a beach in the flood Characteristics A tide is a repeated cycle of sea level changes in the following stages Over several hours the water rises or advances up a beach in the flood An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. The tidal force is a secondary effect of the Force of Gravity and is responsible for the Tides It arises because the gravitational acceleration experienced Tides cause changes in the depth of the marine and estuarine water bodies and produce oscillating currents known as tidal streams. An estuary is a semi-enclosed Coastal body of Water with one or more Rivers or Streams flowing into it and with a free connection to the open The changing tide produced at a given location is the result of the changing positions of the Moon and Sun relative to the Earth coupled with the effects of Earth rotation and the local bathymetry. In physics the Coriolis effect is an apparent deflection of moving objects when they are viewed from a Rotating frame of reference. Bathymetry is the underwater equivalent to Hypsometry. The name comes from Greek βαθυς deep, and μετρον measure. The strip of seashore that is submerged at high tide and exposed at low tide, the intertidal zone, is an important ecological product of ocean tides.

Effects on life

An oasis is an isolated water source with vegetation in desert
An oasis is an isolated water source with vegetation in desert
Some of the biodiversity of a coral reef
Some of the biodiversity of a coral reef
Water reflecting light in Crissy Field
Water reflecting light in Crissy Field

From a biological standpoint, water has many distinct properties that are critical for the proliferation of life that set it apart from other substances. In Geography, an oasis (plural oases) or Cienega ( Southwestern United States) is an isolated area of vegetation in a Desert, typically Water supply is the process of self-provision or provision by third parties of water of various qualities to different users Biodiversity is the variation of Life forms within a given Ecosystem, Biome or for the entire Earth. Coral reefs are Aragonite structures produced by living organisms found in marine waters with little to no nutrients in the water Now a large park in San Francisco, Crissy Field was originally an airfield part of the United States' Presidio Army Base Foundations of modern biology There are five unifying principles Life is a state that distinguishes Organisms from non-living objects such as non-life and dead organisms being manifested by growth through Metabolism It carries out this role by allowing organic compounds to react in ways that ultimately allow replication. An organic compound is any member of a large class of Chemical compounds whose Molecules contain Carbon. All known forms of life depend on water. Water is vital both as a solvent in which many of the body's solutes dissolve and as an essential part of many metabolic processes within the body. A solvent is a liquid or gas that dissolves a solid liquid or gaseous Solute, resulting in a Solution. Metabolism is the set of Chemical reactions that occur in living Organisms in order to maintain Life. Metabolism is the sum total of anabolism and catabolism. In anabolism, water is removed from molecules (through energy requiring enzymatic chemical reactions) in order to grow larger molecules (e. g. starches, triglycerides and proteins for storage of fuels and information). In catabolism, water is used to break bonds in order to generate smaller molecules (e. g. glucose, fatty acids and amino acids to be used for fuels for energy use or other purposes). Water is thus essential and central to these metabolic processes. Therefore, without water, these metabolic processes would cease to exist, leaving us to muse about what processes would be in its place, such as gas absorption, dust collection, etc.

Water is also central to photosynthesis and respiration. Photosynthetic cells use the sun's energy to split off water's hydrogen from oxygen. Hydrogen is combined with CO2 (absorbed from air or water) to form glucose and release oxygen. All living cells use such fuels and oxidize the hydrogen and carbon to capture the sun's energy and reform water and CO2 in the process (cellular respiration).

Water is also central to acid-base neutrality and enzyme function. An acid, a hydrogen ion (H+, that is, a proton) donor, can be neutralized by a base, a proton acceptor such as hydroxide ion (OH−) to form water. Water is considered to be neutral, with a pH (the negative log of the hydrogen ion concentration) of 7. pH is the measure of the acidity or alkalinity of a Solution. Acids have pH values less than 7 while bases have values greater than 7. In Computer science, ACID ( Atomicity Consistency Isolation Durability) is a set of properties that guarantee that Database transactions are Stomach acid (HCl) is useful to digestion. However, its corrosive effect on the esophagus during reflux can temporarily be neutralized by ingestion of a base such as aluminum hydroxide to produce the neutral molecules water and the salt aluminum chloride. Aluminium hydroxide, Al(OH3 is the most stable form of Aluminium in normal conditions Human biochemistry that involves enzymes usually performs optimally around a biologically neutral pH of 7. 4.

For example a cell of Escherichia coli contains 70% of water, a human body 60-70%, plant body up to 90% and the body of an adult jellyfish is made up of 94–98% water. Jellyfish are free-swimming members of the phylum Cnidaria. They have several different basic morphologies that represent several different cnidarian classes including the

Aquatic life forms

Main articles: Hydrobiology and Aquatic plant
Some marine diatoms - a key phytoplankton group
Some marine diatoms - a key phytoplankton group

Earth's waters are filled with life. Hydrobiology is the science of Life and life processes in Water. Aquatic plants &mdash also called hydrophytic plants or hydrophytes &mdash are plants that have adapted to living in or on aquatic environments Diatoms ( Greek: (dia = "through" + (temnein = "to cut" i Phytoplankton are the Autotrophic component of the Plankton community The earliest life forms appeared in water; nearly all fish live exclusively in water, and there are many types of marine mammals, such as dolphins and whales that also live in the water. Fish are aquatic Vertebrate animals that are typically ectothermic (previously Cold-blooded) covered with scales, and equipped with two Dolphins are Marine mammals that are closely related to Whales and Porpoises There are almost forty species of dolphin in seventeen genera. Whales are marine mammals which are neither Dolphins (ie members of the families Delphinidae or Platanistoidae) nor Porpoises Orcas Some kinds of animals, such as amphibians, spend portions of their lives in water and portions on land. Prehistoric amphibian Amphibians (class Amphibia such as Frogs Toads Salamanders Newts Gymnophiona, Sirens and Plants such as kelp and algae grow in the water and are the basis for some underwater ecosystems. Kelp are large Seaweeds ( Algae) belonging to the Brown algae and classified in the order Laminariales Algae ( sing. alga are a large and diverse group of simple typically Autotrophic organisms ranging from Unicellular to Multicellular forms Plankton is generally the foundation of the ocean food chain. Plankton consist of any drifting Organisms ( Animals Plants Archaea, or Bacteria) that inhabit the Pelagic zone of Food chains, also called food networks and/or trophic networks, describe the feeding relationships between species within an Ecosystem.

Aquatic animals must obtain oxygen to survive, and they do so in various ways. Fish have gills instead of lungs, although some species of fish, such as the lungfish, have both. A gill is an anatomical structure found in many aquatic organisms lung is the essential Respiration organ in air-breathing Animals including most Tetrapods a few Fish and a few Snails The most primitive Lungfish are freshwater fish belonging to the Subclass Dipnoi. Marine mammals, such as dolphins, whales, otters, and seals need to surface periodically to breathe air. Marine mammals are a diverse group of roughly 120 species of Mammal that are primarily Ocean -dwelling or depend on the ocean for food Otters are semi- aquatic (or in one case aquatic) fish-eating Mammals The otter subfamily Lutrinae forms part of the family Pinnipeds ("fin-feet" lit "winged feet" or fin-footed mammals are a widely distributed and diverse group of semi-aquatic marine Mammals comprising Smaller life forms are able to absorb oxygen through their skin.

Effects on human civilization

Water Fountain
Water Fountain

Civilization has historically flourished around rivers and major waterways; Mesopotamia, the so-called cradle of civilization, was situated between the major rivers Tigris and Euphrates; the ancient society of the Egyptians depended entirely upon the Nile. A traditional fountain is an arrangement where water issues from a source ( Latin fons) fills a basin of some kind and is drained away Mesopotamia (from the Greek meaning "land between the rivers" is an area geographically located between the Tigris and Euphrates rivers largely corresponding The Tigris is the eastern member of the two great Rivers that define Mesopotamia, along with the Euphrates, which flows from the mountains of southeastern The Euphrates ( ( Arabic: ar نهر الفرات; Turkish: tr Fırat Syriac: syr ܦܪܬ; Hebrew: he פרת This article is about the contemporary North African ethnic group The Nile (النيل, Ancient Egyptian iteru or Ḥ'pī, Coptic piaro or phiaro) is a major north-flowing River Large metropolises like Rotterdam, London, Montreal, Paris, New York City, Shanghai, Tokyo, Chicago, and Hong Kong owe their success in part to their easy accessibility via water and the resultant expansion of trade. A metropolis (from the Greek μήτηρ mētēr meaning 'mother' and πόλις pólis meaning 'city/town' is a big City, in most cases with Rotterdam (pronounced) is the 2nd-largest City by population in the Netherlands, located in the province of London ( ˈlʌndən is the capital and largest urban area in the United Kingdom. Montreal, or Montréal in French ( pronounced in French, in English) is the largest city in the Canadian province of Quebec Paris (ˈpærɨs in English; in French) is the Capital of France and the country's largest city The City of New York Shanghai ( 上[[wikt 海|海]] is the largest city in China in terms of population and one of the largest urban areas in the world with over 20 million officially, is one of the 47 prefectures of Japan and located on the eastern side of the main island Honshū. Chicago (ʃɪˈkɑːgoʊ is the largest City by population in the state of Illinois and the American Midwest of the United States. Hong Kong ( officially the Hong Kong Special Administrative Region, is a territory located on China 's south coast on the Pearl River Delta, and borders Islands with safe water ports, like Singapore, have flourished for the same reason. Singapore In places such as North Africa and the Middle East, where water is more scarce, access to clean drinking water was and is a major factor in human development. North Africa or Northern Africa is the Northernmost Region of the African Continent, separated by the Sahara from Sub-Saharan The Middle East is a Subcontinent with no clear boundaries often used as a synonym to Near East, in opposition to Far East.

Health and pollution

Environmental Scientist sampling water.
Environmental Scientist sampling water. Environmental science is the study of interactions among physical chemical and biological components of the environment.

Water fit for human consumption is called drinking water or potable water. Human beings, humans or man (Origin 1590–1600 L homō man OL hemō the earthly one (see Humus Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not Water that is not potable can be made potable by filtration or distillation (heating it until it becomes water vapor, and then capturing the vapor without any of the impurities it leaves behind), or by other methods (chemical or heat treatment that kills bacteria). Sometimes the term safe water is applied to potable water of a lower quality threshold (i. Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not e. , it is used effectively for nutrition in humans that have weak access to water cleaning processes, and does more good than harm). Water that is not fit for drinking but is not harmful for humans when used for swimming or bathing is called by various names other than potable or drinking water, and is sometimes called safe water, or "safe for bathing". Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not Chlorine is a skin and mucous membrane irritant that is used to make water safe for bathing or drinking. Its use is highly technical and is usually monitored by government regulations (typically 1 part per million (ppm) for drinking water, and 1-2 ppm of chlorine not yet reacted with impurities for bathing water).

This natural resource is becoming scarcer in certain places, and its availability is a major social and economic concern. Currently, about 1 billion people around the world routinely drink unhealthy water. Most countries accepted the goal of halving by 2015 the number of people worldwide who do not have access to safe water and sanitation during the 2003 G8 Evian summit. Sanitation is the hygienic means of preventing human contact from the hazards of wastes to promote health The 29th G8 summit took place in Évian-les-Bains, France, in June 2003 [10] Even if this difficult goal is met, it will still leave more than an estimated half a billion people without access to safe drinking water and over 1 billion without access to adequate sanitation. Poor water quality and bad sanitation are deadly; some 5 million deaths a year are caused by polluted drinking water. Water quality is the physical chemical and biological characteristics of Water in relationship to a set of standards Water, however, is not a finite resource, but rather re-circulated as potable water in precipitation in quantities many degrees of magnitude higher than human consumption. Therefore, it is the relatively small quantity of water in reserve in the earth (about 1% of our drinking water supply, which is replenished in aquifers around every 1 to 10 years), that is a non-renewable resource, and it is, rather, the distribution of potable and irrigation water which is scarce, rather than the actual amount of it that exists on the earth. Water supply is the process of self-provision or provision by third parties of water of various qualities to different users Water-poor countries use importation of goods as the primary method of importing water (to leave enough for local human consumption), since the manufacturing process uses around 10 to 100 times products' masses in water.

In the developing world, 90% of all wastewater still goes untreated into local rivers and streams. Distinguish from Wastwater (a lake in the Lake District in northwest England [11] Some 50 countries, with roughly a third of the world’s population, also suffer from medium or high water stress, and 17 of these extract more water annually than is recharged through their natural water cycles. [12] The strain not only affects surface freshwater bodies like rivers and lakes, but it also degrades groundwater resources.

Human uses

Agriculture

irrigation of field crops
irrigation of field crops

The most important use of water in agriculture is for an irrigation and irrigation is key component to produce enough food. Irrigation is an artificial application of water to the soil usually for assisting in growing crops Agriculture refers to the production of goods through the growing of plants and fungi and the raising of domesticated Animals The study of agriculture Irrigation is an artificial application of water to the soil usually for assisting in growing crops Irrigation takes up to 90% of water withdrawn in some developing countries. [13]

As a scientific standard

On 7 April 1795, the gram was defined in France to be equal to "the absolute weight of a volume of pure water equal to a cube of one hundredth of a meter, and to the temperature of the melting ice. Events 529 - First draft of Corpus Juris Civilis (a fundamental work in Jurisprudence) is issued by Eastern Roman Emperor Year 1795 ( MDCCXCV) was a Common year starting on Thursday (link will display the full calendar of the Gregorian calendar (or a For other uses of the words gram or gramme see Gram (disambiguation. This article is about the country For a topic outline on this subject see List of basic France topics. "[14] For practical purposes though, a metallic reference standard was required, one thousand times more massive, the kilogram. Work was therefore commissioned to determine precisely how massive one liter of water was. The litre or liter (see spelling differences) is a unit of Volume. In spite of the fact that the decreed definition of the gram specified water at 0 °C—a highly stable temperature point—the scientists chose to redefine the standard and to perform their measurements at the most stable density point: the temperature at which water reaches maximum density, which was measured at the time as 4 °C. [15]

The Kelvin temperature scale of the SI system is based on the triple point of water. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic In Thermodynamics, the triple point of a substance is the Temperature and Pressure at which three phases (for example Gas, Liquid The scale is a more accurate development of the Celsius temperature scale, which is defined by the boiling point (100 °C) and melting point (0 °C) of water. The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid The melting point of a solid is the temperature range at which it changes state from solid to Liquid.

Natural water consists mainly of the isotopes hydrogen-1 and oxygen-16, but there is also small quantity of heavier hydrogen-2 (deuterium). The amount of deuterium oxides or heavy water is very small, but it still affects the properties of water. Heavy water is water which contains a higher proportion than normal of the Isotope Deuterium, as deuterium oxide, D2O or ²H2O Water from rivers and lakes tends to contain less deuterium than seawater. Therefore, a standard water called Vienna Standard Mean Ocean Water is defined as the standard water. VSMOW, or Vienna Standard Mean Ocean Water, is an isotopic water standard defined in 1968 by the International Atomic Energy Agency.

For drinking

A young girl drinking bottled water.
A young girl drinking bottled water. Bottled water is Drinking water packaged in Bottles for individual consumption and retail sale
Main article: Drinking water

The human body is anywhere from 55% to 78% water depending on body size. Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not Human beings, humans or man (Origin 1590–1600 L homō man OL hemō the earthly one (see Humus [16] To function properly, the body requires between one and seven liters of water per day to avoid dehydration; the precise amount depends on the level of activity, temperature, humidity, and other factors. The litre or liter (see spelling differences) is a unit of Volume. A day (symbol d is a unit of Time equivalent to 24 Hours and the duration of a single Rotation of planet Earth with respect to the Dehydration ( hypohydration) is the removal of Water ( hydro in ancient Greek) from an object Most of this is ingested through foods or beverages other than drinking straight water. It is not clear how much water intake is needed by healthy people, though most advocates agree that 6–7 glasses of water (approximately 2 litres) daily is the minimum to maintain proper hydration. [17] Medical literature favors a lower consumption, typically 1 liter of water for an average male, excluding extra requirements due to fluid loss from exercise or warm weather. [18] For those who have healthy kidneys, it is rather difficult to drink too much water, but (especially in warm humid weather and while exercising) it is dangerous to drink too little. People can drink far more water than necessary while exercising, however, putting them at risk of water intoxication (hyperhydration), which can be fatal. Water intoxication (also known as hyperhydration or water poisoning) is a potentially fatal disturbance in Brain functions that results when the The "fact" that a person should consume eight glasses of water per day cannot be traced back to a scientific source. [19] There are other myths such as the effect of water on weight loss and constipation that have been dispelled. [20]

An original recommendation for water intake in 1945 by the Food and Nutrition Board of the National Research Council read: "An ordinary standard for diverse persons is 1 milliliter for each calorie of food. Most of this quantity is contained in prepared foods. "[21] The latest dietary reference intake report by the United States National Research Council in general recommended (including food sources): 2. The National Research Council (NRC of the USA is the working arm of the United States National Academy of Sciences and the United States National Academy of 7 liters of water total for women and 3. 7 liters for men. [22] Specifically, pregnant and breastfeeding women need additional fluids to stay hydrated. Pregnancy ( Latin graviditas) is the carrying of one or more offspring known as a Fetus or Embryo, inside the Uterus of a Female Breastfeeding is the feeding of an Infant or young Child with Breast milk directly from human Breasts, not from a Baby bottle or other According to the Institute of Medicine—who recommend that, on average, women consume 2. The Institute of Medicine (IOM is one of the United States National Academies, and is a not-for-profit non-governmental American organization chartered in 1970 as a part of the United 2 litres and men 3. 0 litres—this is recommended to be 2. 4 litres (approx. 9 cups) for pregnant women and 3 litres (approx. 12. 5 cups) for breastfeeding women since an especially large amount of fluid is lost during nursing. [23] Also noted is that normally, about 20 percent of water intake comes from food, while the rest comes from drinking water and beverages (caffeinated included). Caffeine is a bitter white crystalline Xanthine Alkaloid that acts as a Psychoactive Stimulant Drug and a mild Diuretic Water is excreted from the body in multiple forms; through urine and feces, through sweating, and by exhalation of water vapor in the breath. Urine is a liquid waste product of the body secreted by the Kidneys by a process of filtration from Blood and Excreted through the Urethra. Feces, faeces, or fæces (see spelling differences) is a waste product from an animal's digestive tract expelled through the Anus General properties of water vapor Evaporation/sublimation Whenever a water molecule leaves a surface it is said to have evaporated With physical exertion and heat exposure, water loss will increase and daily fluid needs may increase as well.

Hazard symbol for No drinking water
Hazard symbol for No drinking water

Humans require water that does not contain too many impurities. Hazard symbols are easily recognizable symbols designed to warn about hazardous materials or locations Common impurities include metal salts and/or harmful bacteria, such as Vibrio. The Bacteria ( singular: bacterium) are a large group of unicellular Microorganisms Typically a few Micrometres in length bacteria have Vibrio is a Genus of Gram-negative Bacteria possessing a curved rod shape Some solutes are acceptable and even desirable for taste enhancement and to provide needed electrolytes. Solubility is the characteristic Physical property referring to the ability of a given substance the Solute, to dissolve in a Solvent. An electrolyte is any substance containing free Ions that behaves as an electrically conductive medium [24]

The single largest freshwater resource suitable for drinking is Lake Baikal in Siberia, which has a very low salt and calcium content and is very clean. Lake Baikal (о́зеро Байка́л Ozero Baykal, ˈozʲɪrə bʌjˈkɑl Байгал нуур Baygal nuur) is in Southern Siberia in Russia Salt is a Dietary mineral composed primarily of Sodium chloride that is essential for Animal life but toxic to most land plants Calcium (ˈkælsiəm is the Chemical element with the symbol Ca and Atomic number 20

As a dissolving agent or solvent

Dissolving (or suspending) is used to wash everyday items such as the human body, clothes, floors, cars, food, and pets. Solvation, commonly called dissolution, is the process of attraction and association of Molecules of a Solvent with molecules or Ions of a In Chemistry, A suspension is a Heterogenous fluid containing Solid particles that are sufficiently large for Sedimentation. Also, human wastes are carried by water in the sewage system. Human Waste is Suffocation's debut EP released by Relapse Records. Urban areas require some methods for collection and disposal of Sewage. Its use as a cleaning solvent consumes most of water in industrialized countries.

Water can facilitate the chemical processing of wastewater. Distinguish from Wastwater (a lake in the Lake District in northwest England An aqueous environment can be favourable to the breakdown of pollutants, due to the ability to gain an homogenous solution that is pumpable and flexible to treat. Aerobic treatment can be used by applying oxygen or air to a solution reduce the reactivity of substances within it.

Water also facilitates biological processing of waste that have been dissolved within it. WASTE is a Peer-to-peer and Friend-to-friend protocol and software application developed by Justin Frankel at Nullsoft in 2003 that features Microorganisms that live within water can access dissolved wastes and can feed upon them breaking them down into less polluting substances. Reedbeds and anaerobic digesters are both examples of biological systems that are particularly suited to the treatment of effluents. Reed beds are a natural habitat found in Floodplains waterlogged depressions and estuaries. Anaerobic digestion is a series of processes in which Microorganisms break down Biodegradable material in the absence of Oxygen.

Typically from both chemical and biological treatment of wastes, there is often a solid residue or cake that is left over from the treatment process. Depending upon its constituent parts, this 'cake' may be dried and spread on land as a fertilizer if it has beneficial properties, or alternatively disposed of in landfill or incinerated. For other uses see Water treatment and Land reclamation. A landfill, also known as a dump (and historically as Incineration is a waste treatment technology that involves the Combustion of organic materials and/or substances

Water is the most abundant molecule in organisms. Fruits shrink when they are dried because they consist primarly of water.

As a heat transfer fluid

Ice used for cooling.
Ice used for cooling.

Water and steam are used as heat transfer fluids in diverse heat exchange systems, due to its availability and high heat capacity, both as a coolant and for heating. Cool water may even be naturally available from a lake or the sea. Condensing steam is a particularly efficient heating fluid because of the large heat of vaporization. Uses A Steam engine uses the expansion of steam in order to drive a Piston or Turbine to perform Mechanical work. A disadvantage is that water and steam are somewhat corrosive. In almost all electric power plants, water is the coolant, which vaporizes and drives steam turbines to drive generators. A turbine is a rotary Engine that extracts Energy from a Fluid flow

In the nuclear industry, water can also be used as a neutron moderator. In Nuclear engineering, a neutron moderator is a medium which reduces the velocity of Fast neutrons thereby turning them into Thermal neutrons capable In a pressurized water reactor, water is both a coolant and a moderator. Pressurized water reactor ( PWR s (also VVER if of Russian design are generation II nuclear power reactors that use ordinary Water This provides a passive safety measure, as removing the water from the reactor also slows the nuclear reaction down.

Extinguishing fires

Water is used for fighting wildfires.
Water is used for fighting wildfires. Distinguish from a Firefight, which means a battle with firearms A wildfire, also known as a wildland fire, forest fire, brush fire, vegetation fire, grass fire, Peat fire,

Water has a high heat of vaporization and is relatively inert, which makes it a good fire extinguishing fluid. Distinguish from a Firefight, which means a battle with firearms The evaporation of water carries heat away from the fire. However, water cannot be used to fight fires of electric equipment, because impure water is electrically conductive, or of oils and organic solvents, because they float on water and the explosive boiling of water tends to spread the burning liquid.

Decomposition of water may have played a role in the Chernobyl disaster. The Chernobyl disaster was a nuclear reactor accident in the Chernobyl Nuclear Power Plant in the Soviet Union. Initially, cooling of the incandescent reactor was attempted, but the result was an explosion, when the extreme heat caused water to flash into steam, thus leading to a steam explosion; it may also have decomposed water into hydrogen and oxygen, which subsequently exploded. A steam Explosion (also called a Littoral explosion, or fuel-coolant interaction, FCI) is a violent

Chemical uses

Organic reactions are usually quenched with water or a water solution of a suitable acid, base or buffer. A quench refers to a rapid Cooling. In Polymer chemistry and Materials science, quenching is used to prevent low-temperature processes such as phase Water is generally effective in removing inorganic salts. In inorganic reactions, water is a common solvent. In organic reactions, it is usually not used as a reaction solvent, because it does not dissolve the reactants well and is amphoteric (acidic and basic) and nucleophilic. In Chemistry, a nucleophile (literally nucleus lover as in nucleus and phile) is a Reagent that forms a Chemical bond to Nevertheless, these properties are sometimes desirable. Also, acceleration of Diels-Alder reactions by water has been observed. The Diels-Alder reaction is an Organic chemical reaction (specifically a Cycloaddition) between a conjugated Diene and a substituted Alkene, Supercritical water has recently been a topic of research. A supercritical fluid is any substance at a Temperature and Pressure above its Thermodynamic critical point. Oxygen-saturated supercritical water combusts organic pollutants efficiently.

Recreation

Main article: Water sport (recreation)

Humans use water for many recreational purposes, as well as for exercising and for sports. Some of these include swimming, waterskiing, boating, and diving. Swimming is the movement by humans or animals through Water, usually without artificial assistance Water skiing is a Sport where an individual (or more than one individual is pulled behind a Motor boat or a cable ski installation on a body of water wearing Boating, the leisurely activity of traveling by Boat typically refers to the Recreational use of boats whether Power boats sail boats, or Diving off a deck into the Great South Bay of Long Islandjpg|thumb|A man dives into the Great South Bay of Long Island. In addition, some sports, like ice hockey and ice skating, are played on ice. Ice hockey, often referred to simply as hockey, is a team Sport played on Ice. Ice skating is Traveling on Ice with skates, narrow (and sometimes parabolic) blade-like devices moulded into special Boots A study Lakesides, beaches and waterparks are popular places for people to go to relax and enjoy recreation. See List of waterparks (for a list of all waterparks in the world A waterpark is an Amusement park that features waterplay areas such Many find the sound of flowing water to be calming, too. Some keep fish and other life in aquariums or ponds for show, fun, and companionship. An aquarium (plural aquariums or aquaria) is a Vivarium consisting of at least one transparent side in which Water -dwelling Plants A pond is a body of water smaller than a Lake, both being examples of Terrain features Although the term pond is universally used to describe waterbodies that Humans also use water for snow sports i. e. skiing or snowboarding, which requires the water to be frozen. Snow skiing is a group of sports utilizing Skis as primary equipment Snowboarding is a sport that involves descending a Snow -covered slope on a Snowboard attached to a participant's feet using a special boot set into a mounted binding People may also use water for play fighting such as with snowballs, water guns or water balloons. In humans play fighting (sometimes called roughhousing) is an activity in which two or more people act as though they are in Combat, but without actually meaning A snowball is a spherical object made from frozen water or Snow, usually created by scooping snow with the hands and compacting it into a roughly fist-sized A water gun (or water pistol, squirt gun, or water blaster) is a type of Toy designed to shoot Water. A water balloon, or water bomb is a simple small Latex rubber Balloon filled with Water. They may also make fountains and use water in their public or private decorations.

Water industry

Main articles: Water industry and :Category:Water supply and sanitation by country
A water-carrier in India,1882. In many places where running water is not available, water has to be transported by people.
A water-carrier in India,1882. The water industry provides Drinking water and Wastewater services (including Sewage treatment) to households and industry In many places where running water is not available, water has to be transported by people.

The water industry provides drinking water and wastewater services (including sewage treatment) to households and industry. The water industry provides Drinking water and Wastewater services (including Sewage treatment) to households and industry Water of sufficient quality to serve as drinking water is termed potable water whether it is used for drinking or not Distinguish from Wastwater (a lake in the Lake District in northwest England Sewage treatment, or domestic wastewater treatment, is the process of removing Contaminants from Wastewater, both Runoff ( Effluents

A manual water pump in China
A manual water pump in China
water purification facility
water purification facility
Water used in landscaping.
Water used in landscaping. For information on Wikipedia project-related discussions see WikipediaVillage pump. Water purification is the process of removing contaminants and other harmful microorganisms from a raw water source

Water supply facilities includes for example water wells cisterns for rainwater harvesting, water supply network, water purification facilities, water tanks, water towers, water pipes including old aqueducts. Water supply is the process of self-provision or provision by third parties of water of various qualities to different users For cisterns in Neuroanatomy, see Cistern (neuroanatomy.For the village in England see Syston. Rainwater harvesting is the gathering or accumulating and storing of rainwater A water supply network is a system of engineered Hydrologic and Hydraulic components including the watershed or geographic area that collects Water purification is the process of removing contaminants and other harmful microorganisms from a raw water source Water tanks are liquid storage containers these tanks are usually storing water for human consumption A water tower, watershed, or elevated water tower is a large elevated water storage container For the various smoking devices see Hookah or Bong. For other uses see Pipe. An aqueduct is an artificial channel that is constructed to convey water from one location to another Atmospheric water generator is in development. An Atmospheric water generator (AWG or atmospheric condenser is a developing piece of technology with the intent of producing pure drinking water from the Humidity of

Drinking water is often collected at springs, extracted from artificial borings in the ground, or wells. A spring is a point where Groundwater flows out of the ground and is thus where the Aquifer surface meets the ground surface In Machining, boring is the process of enlarging a hole that has already been drilled (or cast by means of a single-point cutting tool (or of a boring Building more wells in adequate places is thus a possible way to produce more water, assuming the aquifers can supply an adequate flow. Other water sources are rainwater and river or lake water. This surface water, however, must be purified for human consumption. Water purification is the process of removing contaminants and other harmful microorganisms from a raw water source This may involve removal of undissolved substances, dissolved substances and harmful microbes. A microorganism (also spelled micro organism or micro-organism and also called a microbe) is an Organism that is Microscopic (usually Popular methods are filtering with sand which only removes undissolved material, while chlorination and boiling kill harmful microbes. Chlorination is the process of adding the element Chlorine to Water as a method of Water purification to make it fit for human consumption as Boiling (also called ebullition) a type of Phase transition, is the rapid vaporization of a Liquid, which typically occurs when a liquid Distillation does all three functions. Distillation is a method of separating Mixtures based on differences in their volatilities in a boiling liquid mixture More advanced techniques exist, such as reverse osmosis. Reverse osmosis (RO is a separation process that uses pressure to force a Solution through a membrane that retains the Solute on one side and allows the Desalination of abundant ocean or seawater is a more expensive solution used in coastal arid climates. Desalination, desalinization, or desalinisation refers to any of several processes that remove excess salt and other Minerals from Water An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. Seawater is Water from a Sea or Ocean. On average seawater in the world's oceans has a Salinity of about 3 In general terms the Climate of a local or region is said to be arid when it is characterized by a severe lack of available Water, to the extent of hindering Climate encompasses the temperatures humidity rainfall atmospheric particle count and numerous other meteorogical factors in a given region over long periods of

The distribution of drinking water is done through municipal water systems or as bottled water. A water supply network is a system of engineered Hydrologic and Hydraulic components including the watershed or geographic area that collects Bottled water is Drinking water packaged in Bottles for individual consumption and retail sale Governments in many countries have programs to distribute water to the needy at no charge. Others argue that the market mechanism and free enterprise are best to manage this rare resource and to finance the boring of wells or the construction of dams and reservoirs. Sao Paulo Stock Exchangejpg|thumb| Virtual market arena where buyer and seller are not present and trade via intemediates and electronical information Free enterprise may refer to Free enterprise system or Free enterprise economy, another term for Capitalism Free A reservoir is most broadly a place or hollow vessel where Fluid is kept in Reserve, for later use

Reducing waste by using drinking water only for human consumption is another option. In some cities such as Hong Kong, sea water is extensively used for flushing toilets citywide in order to conserve fresh water resources. Hong Kong ( officially the Hong Kong Special Administrative Region, is a territory located on China 's south coast on the Pearl River Delta, and borders Water conservation refers to reducing the use of water The goals of water conservation efforts include Sustainability - To ensure availability for

Polluting water may be the biggest single misuse of water; to the extent that a pollutant limits other uses of the water, it becomes a waste of the resource, regardless of benefits to the polluter. Like other types of pollution, this does not enter standard accounting of market costs, being conceived as externalities for which the market cannot account. In Economics, an externality is an impact on any party not directly involved in an economic decision Thus other people pay the price of water pollution, while the private firms' profits are not redistributed to the local population victim of this pollution. Pharmaceuticals consumed by humans often end up in the waterways and can have detrimental effects on aquatic life if they bioaccumulate and if they are not biodegradable. A drug, broadly speaking is any chemical substance that when absorbed into the body Marine biology is the scientific study of living Organisms in the Ocean or other marine or Brackish bodies of water Bioaccumulation occurs when an organism absorbs a toxic substance at a rate greater than that at ftudruinsubstance is lost Biodegradation is the process by which organic substances are broken down by the enzymes produced by living organisms

Wastewater facilities are sewers and wastewater treatment plants. Wastewater treatment plant also called wastewater treatment works Sewage treatment – treatment and disposal of human waste Another way to remove pollution from surface runoff water is bioswale. Surface runoff is a term used to describe when soil is infiltrated to full capacity and excess Water, from Rain, Snowmelt, or other sources flows Bioswales are landscape elements designed to remove Silt and Pollution from Surface runoff water

Industrial applications

Three Gorges Dam is the largest hydro-electric power station
Three Gorges Dam is the largest hydro-electric power station

Water is used in power generation. Zh-yue三峽大壩 The Three Gorges Dam ( is a hydroelectric River Dam that spans the Yangtze River in Sandouping, This article provides a list of the largest hydroelectric power stations. Electricity generation is the process of converting non-electrical Energy to Electricity. Hydroelectricity is electricity obtained from hydropower. Hydroelectricity is electricity generated by Hydropower, ie the production of power through use of the gravitational force of falling water Hydropower, hydraulic power or water power is power that is derived from the Force or Energy of moving water which may Hydroelectric power comes from water driving a water turbine connected to a generator. Hydroelectricity is a low-cost, non-polluting, renewable energy source. The energy is supplied by the sun. Heat from the sun evaporates water, which condenses as rain in higher altitudes, from where it flows down.

Pressurized water is used in water blasting and water jet cutters. A water jet cutter is a tool capable of slicing into Metal or other materials using a jet of Water at high velocity and pressure or a mixture of water and an Also, very high pressure water guns are used for precise cutting. It works very well, is relatively safe, and is not harmful to the environment. It is also used in the cooling of machinery to prevent over-heating, or prevent saw blades from over-heating.

Water is also used in many industrial processes and machines, such as the steam turbine and heat exchanger, in addition to its use as a chemical solvent. A steam turbine is a mechanical device that extracts Thermal energy from pressurized Steam, and converts it into useful mechanical work A heat exchanger is a device built for efficient Heat transfer from one medium to another whether the media are separated by a solid wall so that they never mix or the media A solvent is a liquid or gas that dissolves a solid liquid or gaseous Solute, resulting in a Solution. Discharge of untreated water from industrial uses is pollution. Pollution is the introduction of contaminants into an environment that causes instability disorder harm or discomfort to the physical systems or living organisms they are in Pollution includes discharged solutes (chemical pollution) and discharged coolant water (thermal pollution). Water pollution is the contamination of Water bodies such as Lakes Rivers Oceans and Groundwater caused by human activities Industry requires pure water for many applications and utilizes a variety of purification techniques both in water supply and discharge. Water purification is the process of removing contaminants and other harmful microorganisms from a raw water source

Food processing

Water can be used to cook foods such as noodles.
Water can be used to cook foods such as noodles. A noodle is food made from unleavened Dough that is cooked in a boiling liquid

Water plays many critical roles within the field of food science. Food science is a discipline concerned with all technical aspects of Food, beginning with Harvesting or slaughtering, and ending with its Cooking It is important for a food scientist to understand the roles that water plays within food processing to ensure the success of their products.

Solutes such as salts and sugars found in water affect the physical properties of water. The boiling and freezing points of water is affected by solutes. One mole of sucrose (sugar) raises the boiling point of water by 0. The mole (symbol mol) is a unit of Amount of substance: it is an SI base unit, and almost the only unit to be used to measure this 52 °C, and one mole of salt raises the boiling point by 1. 04 °C while lowering the freezing point of water in a similar way. [25] Solutes in water also affect water activity which affects many chemical reactions and the growth of microbes in food. [26] Water activity can be described as a ratio of the vapor pressure of water in a solution to the vapor pressure of pure water. [25] Solutes in water lower water activity. This is important to know because most bacterial growth ceases at low levels of water activity. [26] Not only does microbial growth affect the safety of food but also the preservation and shelf life of food.

Water hardness is also a critical factor in food processing. It can dramatically affect the quality of a product as well as playing a role in sanitation. Water hardness is classified based on the amounts of removable calcium carbonate salt it contains per gallon. Water hardness is measured in grains; 0. 064 g calcium carbonate is equivalent to one grain of hardness. [25] Water is classified as soft if it contains 1 to 4 grains, medium if it contains 5 to 10 grains and hard if it contains 11 to 20 grains. [25] The hardness of water may be altered or treated by using a chemical ion exchange system. The hardness of water also affects its pH balance which plays a critical role in food processing. For example, hard water prevents successful production of clear beverages. Water hardness also affects sanitation; with increasing hardness, there is a loss of effectiveness for its use as a sanitizer. [25]

Boiling, steaming, and simmering are popular cooking methods that often require immersing food in water or its gaseous state, steam. Boiling (also called ebullition) a type of Phase transition, is the rapid vaporization of a Liquid, which typically occurs when a liquid Steaming is a method of Cooking using Steam. Steaming is considered a relatively healthier cooking technique and capable to cook almost all kinds of food Simmering is a Cooking technique in which Foods are cooked in hot liquids kept at or just barely below the boiling point of Water (at average sea level Cooking is the process of preparing Food by applying Heat, selecting measuring and combining of ingredients in an ordered procedure for producing safe and edible While cooking water is used for dishwashing too. The term dishwashing refers to Cleaning eating and Cooking utensils in addition to Dishes In British English the term washing up is

Water politics and water crisis

Main articles: Water politics and Water crisis
See also: Water resources, Water law, and Water right

Water politics is politics affected by water and water resources. Water politics, sometimes called hydropolitics, is Politics affected by Water and Water resources. Water Crisis is a term that refers to the status of the world’s Water resources relative to human demand Water resources are sources of Water that are useful or potentially useful to Humans Uses of water include Agricultural, industrial, Household This article has been tagged &mdash please see the bottom of the page for more information This article discusses water usage laws in common law. For a discussion of the right to water as a human right under international law, see Right Water politics, sometimes called hydropolitics, is Politics affected by Water and Water resources. Politics Politics is the process by which groups of people make decisions Water resources are sources of Water that are useful or potentially useful to Humans Uses of water include Agricultural, industrial, Household Because of overpopulation, mass consumption, misuse, and water pollution, the availability of drinking water per capita is inadequate and shrinking as of the year 2006. Overpopulation refers to a condition where an Organism 's numbers exceed the Carrying capacity of its Habitat. Consumerism is the equation of personal Happiness with the purchase of material possessions and consumption. Water pollution is the contamination of Water bodies such as Lakes Rivers Oceans and Groundwater caused by human activities Per capita is a Latin phrase meaning for each head with Per meaning 'through' or 'by' For this reason, water is a strategic resource in the globe and an important element in many political conflicts. It causes health impacts and damage to biodiversity. The serious worldwide water situation is called water crisis. Water Crisis is a term that refers to the status of the world’s Water resources relative to human demand

UNESCO's World Water Development Report (WWDR, 2003) from its World Water Assessment Program indicates that, in the next 20 years, the quantity of water available to everyone is predicted to decrease by 30%. United Nations Educational Scientific and Cultural Organization ( UNESCO) is a specialized agency of the United Nations established on November 16 40% of the world's inhabitants currently have insufficient fresh water for minimal hygiene. Hygiene refers to practices associated with ensuring good health and cleanliness More than 2. 2 million people died in 2000 from waterborne diseases (related to the consumption of contaminated water) or drought. Waterborne diseases are caused by Pathogenic Microorganisms which are directly transmitted when contaminated Drinking water is consumed A drought is an extended period of months or years when a region notes a deficiency in its water supply In 2004, the UK charity WaterAid reported that a child dies every 15 seconds from easily preventable water-related diseases; often this means lack of sewage disposal; see toilet. WaterAid is an international Non-profit organisation dedicated to helping people escape the Poverty and Disease Sewage is the mainly liquid Waste containing some solids produced by humans which typically consists of washing water Feces, Urine, laundry waste and other A toilet is a Plumbing fixture and disposal system primarily intended for the disposal of the bodily wastes: Urine and fecal matter.

To halve, by 2015, the proportion of people without sustainable access to safe drinking water is one of the Millennium Development Goals.

Fresh water — now more precious than ever in our history for its extensive use in agriculture, high-tech manufacturing, and energy production — is increasingly receiving attention as a resource requiring better water management and sustainable use. Water management is the practices of planning developing distribution and optimum utilizing of water resources under defined water polices and regulations Sustainability, in a general sense is the capacity to maintain a certain process or state indefinitely

Organizations concerned in water protection include International Water Association (IWA), WaterAid, Water 1st, American Water Resources Association. The International Water Association (IWA is a self-governing Non-profit organization which aims to cover all facets of the Water cycle. WaterAid is an international Non-profit organisation dedicated to helping people escape the Poverty and Disease Water 1st International is a Non-profit organization helping people in poor countries implement Water, Sanitation and hygiene education projects Water related conventions are United Nations Convention to Combat Desertification (UNCCD), International Convention for the Prevention of Pollution from Ships, United Nations Convention on the Law of the Sea and Ramsar Convention. The United Nations Convention to Combat Desertification in Those Countries Experiencing Serious Drought and/or Desertification Particularly in Africa is a Convention to combat Desertification Marpol 73/78 is the International Convention for the Prevention of Pollution From Ships 1973 as modified by the Protocol of 1978. The United Nations Convention on the Law of the Sea ( UNCLOS) also called the Law of the Sea Convention or the Law of the Sea treaty is the international agreement that resulted The Ramsar Convention is an international Treaty for the conservation and sustainable utilization of Wetlands i World Day for Water takes place at March 22 and World Ocean Day at June 8. In 1993 the United Nations General Assembly declared March 22 as World Day for Water (also known as World Water Day) This day was first formally Events 238 - Gordian I and his son Gordian II are proclaimed Roman emperor. World Ocean Day began on 8 June, 1992 at the Earth Summit in Rio de Janeiro, Brazil. Events 68 - The Roman Senate accepts emperor Galba. 536 - St Silverius becomes Pope (probable

Water used in the production of a good or service is virtual water. Virtual water (also known as embedded water, embodied water, or hidden water) refers in the context of trade to the water used in the production of a

Religion, philosophy, and literature

A Hindu ablution as practiced in Tamil Nadu
A Hindu ablution as practiced in Tamil Nadu

Water is considered a purifier in most religions. Tamil Nadu ( Tamil:, Country of the Tamils, t̪ɐmɨɻ n̪aːɽɯ is one of the 28 states of India. Major faiths that incorporate ritual washing (ablution) include Christianity, Hinduism, Rastafarianism, Islam, Shinto, Taoism, and Judaism. Christianity ( Greek Χριστιανισμός from the word Xριστός ( Christ)is a monotheistic Religion centered on the life and teachings Hinduism is a religious tradition that originated in the Indian subcontinent. The Rastafari movement (also known as Rastafari, Rastafarianism or simply Rasta) is a monotheistic, Abrahamic, New Testament For other meanings including people named 'Islam' see Islam (disambiguation. is the native religion of Japan and was once its State religion. Taoism (pronounced /ˈdaʊɪzəm/ or /ˈtaʊɪzəm/ also spelled '''Daoism''') refers to a variety of related Philosophical and Religious traditions Judaism (from the Greek Ioudaïsmos, derived from the Hebrew יהודה Yehudah, " Judah " in Hebrew יַהֲדוּת Yahedut Immersion (or aspersion or affusion) of a person in water is a central sacrament of Christianity (where it is called baptism); it is also a part of the practice of other religions, including Judaism (mikvah) and Sikhism (Amrit Sanskar). Aspersion ( la aspergere) in a Religious context is the act of sprinkling with Water, especially Holy water. Affusion ( la affusio) is a method of Baptism where water is poured on the head of the person being baptized A sacrament, as defined in Hexam's Concise Dictionary of Religion is "a Rite in which God is uniquely active In Christianity, baptism ( Greek, "immersing" "performing Ablutions " is the ritual act with the use of water by which one is admitted Mikvah (or mikveh) ( plural mikva'ot or mikves) is a ritual bath designed for the purpose of ritual immersion in Judaism. Sikhism ( IPA: or; ਸਿੱਖੀ sikkhī, IPA:) founded on the teachings of Nanak and nine successive gurus in fifteenth century Amrit Sanskar or Amrit Sanchar or the Amrit ceremony is the Sikh ceremony of initiation or baptism In addition, a ritual bath in pure water is performed for the dead in many religions including Judaism and Islam. In Islam, the five daily prayers can be done in most cases after completing washing certain parts of the body using clean water (wudu). This article is about Hygiene in Islam. Tayammum (تيمم refers to the dry Ablution in Islam using sand or dust which may This article is about Hygiene in Islam. Wudu ( Arabic: الوضوء al-wuḍū', Persian:آبدست ābdast In Shinto, water is used in almost all rituals to cleanse a person or an area (e. g. , in the ritual of misogi). is a Shinto practice of lustration. This may be undertaken through exhaustive activities such as extended periods without sleep breath training, standing under waterfalls Water is mentioned in the Bible 442 times in the New International Version and 363 times in the King James Version: 2 Peter 3:5(b) states, "The earth was formed out of water and by water" (NIV). Etymology According to the Online Etymology Dictionary, the word bible is from Latin biblia, traced from the same word through Medieval Latin and Late Latin The New International Version is an English Translation of the Christian Bible.

Some faiths use water especially prepared for religious purposes (holy water in some Christian denominations, Amrita in Sikhism and Hinduism). Holy water can also refer to water that has been blessed, such as by a Priest, and is considered Holy. Amrita or Amrit (अमृत ਅੰਮ੍ਰਿਤ ಅಮೃತ అమృతము is a Sanskrit word that literally means "without death" and is often Many religions also consider particular sources or bodies of water to be sacred or at least auspicious; examples include Lourdes in Roman Catholicism, the Jordan River (at least symbolically) in some Christian churches, the Zamzam Well in Islam and the River Ganges (among many others) in Hinduism. Lourdes ( Occitan: Lorda) is a town and commune situated in the southwest of the Hautes-Pyrénées department, lying in the first Pyrenean This article is about the Jordan River and its valley in western Asia The Well of Zamzam (or the Zamzam Well, or just Zamzam; Arabic: زمزم) is a well located within the Masjid al Haram in The Ganges (ˈgænʤiːz also Ganga, Devanāgarī: hi गंगा in most Indian languages) is the major river in the Indian subcontinent

Water is often believed to have spiritual powers. In Celtic mythology, Sulis is the local goddess of thermal springs; in Hinduism, the Ganges is also personified as a goddess, while Saraswati have been referred to as goddess in Vedas. Celtic mythology is the Mythology of Celtic polytheism, apparently the Religion of the Iron Age Celts Like other Iron Age In localised Celtic polytheism practiced in Britain Sul or Sulis was the deification of the thermal spring-water of Bath Somerset, where she was worshipped A goddess is a Female Deity. Many Cultures have goddesses Often deities are part of a polytheistic system that includes several deities In Hinduism, the river Ganga ( Sanskrit and Hindi गंगा Gaṅgā) or Ganges River (as called by westerners is considered Saraswati (pronounced as; Sanskrit: sa सरस्वती sarasvatī; Malay: Saraswati Thai: สุรัสวดี is the "Veda" redirects here For other uses see Veda (disambiguation. Also water is one of the "panch-tatva"s (basic 5 elements, others including fire, earth, space, air). Fire is the heat and light energy released during a Chemical reaction, in particular a combustion reaction. EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 Space is the extent within which Matter is physically extended and objects and Events have positions relative to one another Temperature and layers The temperature of the Earth's atmosphere varies with altitude the mathematical relationship between temperature and altitude varies among five Alternatively, gods can be patrons of particular springs, rivers, or lakes: for example in Greek and Roman mythology, Peneus was a river god, one of the three thousand Oceanids. Greek mythology is the body of stories belonging to the ancient Greeks concerning their gods and Heroes the nature of the world and the origins and significance Roman mythology, or more appropriately Latin mythology, refers to the mythological beliefs of the Italic people inhabiting the region of Latium and its The word mythology (from the Greek grc μυθολογία mythología, meaning "a story-telling a legendary lore" See also Pineios River (Thessaly and Pineios River (Peloponnese. In Greek and Roman mythology, the Oceanids ( Greek: Ὠκεανίδαι pl In Islam, not only does water give life, but every life is itself made of water: "We made from water every living thing". [27]

The Ancient Greek philosopher Empedocles held that water is one of the four classical elements along with fire, earth and air, and was regarded as the ylem, or basic substance of the universe. Empedocles ( Greek:, ca 490–430 BC was a Greek Pre-Socratic Philosopher and a citizen of Agrigentum, a Greek colony in Many ancient philosophies used a set of archetypal classical "elements" to explain patterns in Nature. Fire is the heat and light energy released during a Chemical reaction, in particular a combustion reaction. EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 In traditional cultures air is often seen as a universal power or pure substance Ylem is a term which was used by George Gamow, Ralph Alpher and their associates in the late 1940's for a hypothetical original substance or condensed state of matter Water was considered cold and moist. In the theory of the four bodily humors, water was associated with phlegm. Humorism, or humoralism, was a theory of the makeup and workings of the human body adopted by Greek and Roman physicians and philosophers Phlegm ( is sticky Fluid secreted by the Mucous membranes of Humans and other Animals. Water was also one of the five elements in traditional Chinese philosophy, along with earth, fire, wood, and metal. Water has been important to all peoples of the earth and it is rich in spiritual tradition In traditional Chinese philosophy, natural phenomena can be classified into the Wu Xing ( or the Five Phases, usually translated as five elements, Chinese philosophy is Philosophy written in the Chinese tradition of thought Earth, home and origin of humanity has often been worshipped in its own right with its own unique spiritual tradition Fire has been an important part of many cultures and religions from pre-history to modern day and was vital to the development of civilization In traditional Chinese philosophy, Wood is classified as one of the Wu xing ( or the Five Elements, also translated as five phases In traditional Chinese philosophy, Metal is classified as one of the Wu xing ( or the Five Elements, also translated as five phases

Water also plays an important role in literature as a symbol of purification. The musical instrument is spelled Cymbal. A symbol is something --- such as an object, Picture, written word a sound a piece Examples include the critical importance of a river in As I Lay Dying by William Faulkner and the drowning of Ophelia in Hamlet. As I Lay Dying is a Novel written by the American author William Faulkner. William Faulkner (born William Cuthbert Falkner) ( September 25, 1897 – July 6, 1962) was an American Author Drowning is Death as caused by suffocation when a liquid causes interruption of the body's absorption of oxygen from the air leading to Asphyxia. Hamlet is a Tragedy by William Shakespeare, believed to have been written between 1599 and 1601

Sherlock Holmes held that "From a drop of water, a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. Sherlock Holmes is a famous fictional detective of the late nineteenth and early twentieth centuries who first appeared in Publication in 1887 The Niagara Falls are massive Waterfalls on the Niagara River, straddling the international border separating the Canadian province of Ontario "[28]

References

  1. ^ Water Vapor in the Climate System, Special Report, [AGU], December 1995 (linked 4/2007). Vital Water UNEP. The UN Environment Programme (or UNEP) coordinates United Nations environmental activities assisting developing countries in implementing environmentally sound policies
  2. ^ Kulshreshtha, S. N (1998). "[Scholar?hl=en&lr=&ie=UTF-8&sa=G&oi=qs&q=%2210. 1023+a+1007957229865%22+author:s-kulshreshtha A Global Outlook for Water Resources to the Year 2025]". Water Resources Management 12 (3): 167–184. doi:10.1023/A:1007957229865. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document.  
  3. ^ Baroni, L. ; Cenci, L. ; Tettamanti, M. ; Berati, M. (2007). "Evaluating the environmental impact of various dietary patterns combined with different food production systems". European Journal of Clinical Nutrition 61: 279–286. doi:10.1038/sj.ejcn.1602522. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document.  
  4. ^ Braun, Charles L. ; Sergei N. Smirnov (1993). "Why is water blue?" (HTML). J. Chem. Educ. 70 (8): 612.  
  5. ^ Kotz, J. C. , Treichel, P. , & Weaver, G. C. (2005). Chemistry & Chemical Reactivity. Thomson Brooks/Cole.
  6. ^ Gary Melnick, Harvard-Smithsonian Center for Astrophysics and David Neufeld, Johns Hopkins University quoted in: "Discover of Water Vapor Near Orion Nebula Suggests Possible Origin of H20 in Solar System (sic)", The Harvard University Gazette, April 23, 1998. The Harvard-Smithsonian Center for Astrophysics (CfA is arguably the largest and most diverse astrophysical institution in the world where scientists carry out a broad program of research   "Space Cloud Holds Enough Water to Fill Earth's Oceans 1 Million Times", Headlines@Hopkins, JHU, April 9, 1998.   "Water, Water Everywhere: Radio telescope finds water is common in universe", The Harvard University Gazette, February 25, 1999.  (linked 4/2007)
  7. ^ Water Found on Distant Planet July 12, 2007 By Laura Blue, Time
  8. ^ Water Found in Extrasolar Planet's Atmosphere - Space. For other uses see Time (disambiguation Time is a component of a measuring system used to sequence events to compare the durations of com
  9. ^ J. C. I. Dooge. "Integrated Management of Water Resources". in E. Ehlers, T. Krafft. (eds. ) Understanding the Earth System: compartments, processes, and interactions. Springer, 2001, p. 116. More references are at the end of the article "Habitable Zone" at The Encyclopedia of Astrobiology, Astronomy and Spaceflight.
  10. ^ G8 "Action plan" decided upon at the 2003 Evian summit
  11. ^ UNEP International Environment (2002). Environmentally Sound Technology for Wastewater and Stormwater Management: An International Source Book. IWA Publishing. ISBN 1843390086.  
  12. ^ Ravindranath, Nijavalli H. ; Jayant A. Sathaye (2002). Climate Change and Developing Countries. Springer. ISBN 1402001045.  
  13. ^ WBCSD Water Faacts & Trends
  14. ^ Decree relating to the weights and measurements
  15. ^ here L'Histoire Du Mètre, La Détermination De L'Unité De Poids
  16. ^ Re: What percentage of the human body is composed of water? Jeffrey Utz, M. D. , The MadSci Network
  17. ^ Healthy Water Living. Retrieved on 2007-02-01. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. Events 1327 - Teenaged Edward III is crowned King of England, but the country is ruled by his mother Queen
  18. ^ Rhoades RA, Tanner GA (2003). Medical Physiology, 2nd ed. , Baltimore: Lippincott Williams & Wilkins. ISBN 0781719364.  
  19. ^ "Drink at least eight glasses of water a day." Really? Is there scientific evidence for "8 × 8"? by Heinz Valdin, Department of Physiology, Dartmouth Medical School, Lebanon, New Hampshire
  20. ^ Drinking Water - How Much?, Factsmart. New Hampshire ( is a state in the New England region of the northeastern United States of America. org web site and references within
  21. ^ Food and Nutrition Board, National Academy of Sciences. Recommended Dietary Allowances, revised 1945. National Research Council, Reprint and Circular Series, No. 122, 1945 (Aug), p. 3-18.
  22. ^ Dietary Reference Intakes: Water, Potassium, Sodium, Chloride, and Sulfate, Food and Nutrition Board
  23. ^ Water: How much should you drink every day? - MayoClinic.com
  24. ^ Maton, Anthea; Jean Hopkins, Charles William McLaughlin, Susan Johnson, Maryanna Quon Warner, David LaHart, Jill D. Wright (1993). Human Biology and Health. Englewood Cliffs, New Jersey, USA: Prentice Hall. ISBN 0-13-981176-1.  
  25. ^ a b c d e Vaclacik and Christian, 2003
  26. ^ a b DeMan, 1999
  27. ^ Sura of Al-Anbiya 21:30
  28. ^ Arthur Conan Doyle, A Study in Scarlet, Chapter 2, "The Science of Deduction"

Further reading

Water as a natural resource

Dictionary

water

-noun

  1. (uncountable) A clear liquid potable by humans and animals; the chemical H2O.
  2. (sometimes, countable) Mineral water.
  3. (countable, often in plural) Spa water.
  4. (alchemy) One of the four basic elements.
  5. (India and Japan) One of the five basic elements (see Wikipedia article on the Classical elements).
  6. (in plural) A sea belonging to particular country.
  7. (in plural) Any body of water, such as a river or a lake.
  8. (colloquial) Urine.
  9. (UK, in plural) amniotic fluid.
  10. (US, in singular) Amniotic fluid.
  11. (figuratively, in plural or in singular) A state of affairs; conditions; usually with an adjective indicating an adverse condition.
  12. (Can we verify(+) this sense?)(in plural) A complex or difficult situation.
  13. (Can we verify(+) this sense?) Awkward position or circumstance; trouble.
  14. (countable) A serving of water.
  15. Tap water, or well/pump water, as opposed to bottled water.

-verb

  1. (transitive) To pour water into the soil surrounding (plants).
  2. (transitive) To provide (animals) with water.
  3. (transitive, colloquial) To urinate.
  4. (transitive) To dilute. Also 'water down'.
  5. (intransitive) (Of eyes) to fill with tears due to irritation, pain etc.
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