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Water or water is a common chemical substance whose molecule is made up of two hydrogen atoms and one oxygen atom in drinking water benefits - H 2 O. This is the basis of the life of all beings. The term water is commonly used for the fluid state but it is also found in the solid state ( ice ) and gaseous state ( steam or water vapor ). Water is also found as liquid-crystals on water-sensitive surfaces. [1] [2]
About 71% of the Earth is covered by 1.460 mole (PT) (10 21 kg) of water which is mostly part of the oceans and other large water bodies. In addition, 1.6% underground water aquifer and 0.001% water vapor and clouds ( They are formed as suspended solids and liquid particles of water in the air). [3] Brackish oceans account for 97% of the Earth's total, 2.4% of glacial and polar ice peaks and 0.6% of other sources such as rivers, lakes and ponds. A very small amount of water on Earth is contained within water tanks, biological bodies, manufactured products, and food stores. The water of snowy peaks, glaciers, aquifers or lakes sometimes provides clean water for life on earth.
Water constantly rotates in a cycle called water cycle, this includes evaporation or transpiration , rain and flow into the ocean. The air blows the water vapor over the site at the same rate at which it flows into the ocean at about 36 Tt (10 12 kg) per year. In addition to 107 Tt of rainfall on land, evaporation contributes an additional 71 Tt per year. Clean and fresh drinking water is essential for human and other life, but in many parts of the world, especially in developing countries, there is severe water scarcity and it is estimated that by 2025 half of the world's population will be two to four. [4] Water plays an important role in the world economy, as it is the solvent for a wide range of chemical substancesAnd facilitates industrial refrigeration and transportation. About 70% of fresh water is consumed in agriculture. [5]
Is one of the substances that naturally occurs in all three states on Earth. Water is found on Earth in many different forms: water vapor and clouds in the sky ; Seawater and sometimes icebergs in the sea ; Glaciers and rivers in the mountains ; And as an aquifer on land in liquid form.
Many substances are mixed in water which gives it a different taste and smell . In fact, humans and other animals have developed a vision over time through which they are able to evaluate the potability of drinking water and do not drink too salty or rotten water. Humans like to drink lukewarm water from cold ; The number of microbes in cold water is likely to be much lower. Pure water fades in H 2 O flavor while the water of fountain (waterfall) or mineral water is due to the mineral salts contained in it. The quality of water (spring) or saline water refers to the absence of toxic substances, pollutants and microbes in them.
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