1. WHY IS WATER SO IMPORTANT ?

2. There are various theories about origin of water on the Earth. For example, scientists suggest that early Earth had a thick hydrogen atmosphere, which interacted with the oxygen in the structure of the planet, with the result the water was formed.

3. Water is the chemical substance with chemical formula H2O: one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. (Model of hydrogen bonds between molecules of water)

4. Water appears in nature in all three common states of matter and may take many different forms on Earth: water vapor and clouds in the sky; seawater and icebergs in the polar oceans; glaciers and rivers in the mountains; and the liquid in aquifers in the ground.

5. The major chemical and physical properties of water are: Water is a tasteless, odorless liquid at standard temperature and pressure. The color of water and ice is, intrinsically, a very slight blue hue, although water appears colorless in small quantities. Water is a tasteless, odorless liquid at standard temperature and pressure. The color of water and ice is, intrinsically, a very slight blue hue, although water appears colorless in small quantities. Water is transparent, and thus aquatic plants can live within the water because sunlight can reach them. Only strong UV light is slightly absorbed. Water is transparent, and thus aquatic plants can live within the water because sunlight can reach them. Only strong UV light is slightly absorbed. Since the water molecule is not linear and the oxygen atom has a higher electronegativity than hydrogen atoms, it carries a slight negative charge, whereas the hydrogen atoms are slightly positive. As a result, water is a polar molecule with an electrical dipole moment. Since the water molecule is not linear and the oxygen atom has a higher electronegativity than hydrogen atoms, it carries a slight negative charge, whereas the hydrogen atoms are slightly positive. As a result, water is a polar molecule with an electrical dipole moment. Water is a good solvent and is often referred to as the universal solvent. Water is a good solvent and is often referred to as the universal solvent. Pure water has a low electrical conductivity, but this increases significantly with the dissolution of a small amount of ionic material such as sodium chloride. Pure water has a low electrical conductivity, but this increases significantly with the dissolution of a small amount of ionic material such as sodium chloride.

6. 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.

7. From a biological standpoint, water has many distinct properties that are critical for the proliferation of life that set it apart from other substances. It carries out this role by allowing organic compounds to react in ways that ultimately allow replication. All known forms of life depend on water.

8. People can’t live without water. Water balance is crucial for the whole organism.

9. Human uses Human uses Agriculture (Irrigation of field crops) Agriculture (Irrigation of field crops) Water as a scientific standard Water as a scientific standard Hygiene Hygiene For drinking For drinking Ice used for cooling Ice used for cooling Water is used for fighting wildfires Water is used for fighting wildfires Water sport (recreation) Water sport (recreation) Water industry Water industry Water is used in power generation Water is used in power generation Water can be used to cook foods Water can be used to cook foods Water plays many critical roles within the field of food science Water plays many critical roles within the field of food science Water is used for dishwashing Water is used for dishwashing etc. etc.

10. Water, for cooking Water, for cleaning Water, for drinking Water, for living Water, for dying.

11. Water is an essential ingredient of all living cells. Water helps a plant by transporting important nutrients through the plant. Nutrients are drawn from the soil and used by the plant. Without enough water in the cells, the plants droop, so water helps a plant stand. Water carries the dissolved sugar and other nutrients through the plant. So without the proper balance of water, the plant not only is malnourished, but it is also physically weak and cannot support its own weight.

12. Water makes up the majority of an animals’ body throughout growth and development. Animals gain water from the food they eat, from oxidation of fats and proteins in the body, and from the action of drinking water from a source such as a river or lake. Properties of water may help to normalize bodily functions such as regulation of body temperature, body weight, and also becomes a factor in determining health (losing one tenth of the body’s water results in death, for example).

13. By means of water, we give life to everything. Koran Water, water everywhere, water all around, Water in the ocean, water in the ground. Water in a river, water in a creek, Water in a faucet with a drip-drip leak! Water in a fountain, water in a lake, Water on a flower, as day begins to break. Water from a waterfall, rushing down from high, Water from a dark cloud, raining from the sky. Water boiling hot, water frozen ice, Water in a blue lagoon, clean and clear and nice. Water at a fire, gushing through a hose, Water in a garden, so every flower grows. Water for the animals swimming in the sea, Water, water everywhere for you and for me! Water, water everywhere, water all around, Water in the ocean, water in the ground. Water in a river, water in a creek, Water in a faucet with a drip-drip leak! Water in a fountain, water in a lake, Water on a flower, as day begins to break. Water from a waterfall, rushing down from high, Water from a dark cloud, raining from the sky. Water boiling hot, water frozen ice, Water in a blue lagoon, clean and clear and nice. Water at a fire, gushing through a hose, Water in a garden, so every flower grows. Water for the animals swimming in the sea, Water, water everywhere for you and for me!

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