The chief sources of potable water are the surface water and ground water. The ground water is drawn by deep tube-wells and water pumps. Water is supplied to the consumers through roadside taps and house connections. In rural areas, the supply of drinking water is hopelessly inadequate. Causes for water crisis: India has built mega dams for irrigation, but her water management system has not received due attention. We are told that water crisis has touched millions people across several states.
Arsenic contaminated water made the problem more grave. During the monsoon, many areas of India are flooded, causing widespread damage to life and property and this enormous quantity of water is allowed to flow down into the sea. If the rain water is harvested and preserved in tanks and reservoir regularly, it may help us to tide over the water crisis. Sweat, and its evaporation is a vital cooling process for biological mammals and depend greatly on the large amount of heat energy required to break the hydrogen bonds between water molecules.
Hydrogen bonding maintains the integrity of the water molecule during chemical reactions. Other compounds undergo chemical changes ionization , where as water will maintain its chemical integrity. As a result water is a poor conductor of electrical current. In conclusion, three main unique features which are the consequences of hydrogen bonding in water are: These and other unique properties of water are responsible for the important role that water plays in life.
It provides the medium in which most biochemical interactions occur. Some biochemical reactions water is involved in are: Water is the home for many animals, plants and micro-organisms. Water is involved in the cycling of all other material by living things both on a local and global scale.
Water has a number of unique and unusual properties that are responsible for its important roles it plays in the biosphere. Water has unusually high boiling and freezing points compared to other compounds with similar molecular structure. A comparison of boiling and freezing points can be seen in the following chart.
Notice only water has a boiling and melting point that exists within the range of life. The boiling point of water is a unique oC results is and the freezing point is a remarkable 0oC due to the fact of the polar nature of the water molecule and hydrogen bonding. Two important, but not unique, properties of water for life are that water is liquid at normal temperatures over much of the earth and that water is transparent.
If water were not liquid, nutrients could not flow from soil to the roots of plants, blood could not circulate, and bodies of organisms would be so rigid that they could not move. If water were not transparent, light could not penetrate through cellular protoplasm into chloroplasts to drive photosynthesis in plants, you would be blind because light could not penetrate through the vitreous humor to the retina of your eyes, and light could not penetrate into lakes to allow growth of phytoplankton.
Clearly life cannot exist without the amazing properties of water. A solvent is a substance capable of dissolving another substance solute to form a homogeneous mixture solution at a molecular level. The polar nature of water makes it an excellent solvent especially with other polar compounds such as salts, alcohols, carboxylic compounds and many more.
More substances dissolve in water than any other known substance. The versitility of water as a solvent allows it to serve as the medium of transport for so many materials. This is true both for individual organism and for the biosphere as a whole.
The essential transport systems including blood, lymph, and urine are all water based. Water is the only substance where the liquid state is heavier than the solid state.
All other substances the solid form is denser than the liquid form. Since the density of ice is less than that of liquid Walter, ice floats on water. It is very significant that ice expands and floats on water because if lakes and streams froze from the bottom to the top, aquatic life would not even exist, and climate and weather patterns would be altered drastically. This is an important quality of water because as ice forms it floats on top of the water. It acts to provide a thermal blanket for the rest of the water beneath and all its many life forms.
This is important because if water behaved like all other substances, water bodies would freeze from the bottom up and in most cases would never thaw completely during summer. This would have a dramatic cooling effect globally and would impact all life on earth.
We see examples of this all the time. For example, under the summer sun at the beach, sand will increase in temperature to the point where it is too hot to walk on, whereas the water temperature is still cool, even though both are heated by the same amount of solar heat energy.
Water has the largest heat capacity of any common substance. This means that water takes more heat energy to raise the temperature of water a given number of degrees than for any other material. In cooling water gives up more heat than any other material. This property is important globally and individually. Individually, the high heat capacity buffers organisms from sudden extreme shifts in temperature which would be harmful to it.
Globally, the oceans moderate seasonal temperature fluctuations. That is why coastal areas are cooler than inland areas at the same latitude. These differences influence the weather globally. And without weather changes life would be very unbearable. The absorption of huge amounts of solar heat energy by water during the day and the slow release of heat energy during the night is responsible for the moderate climate in the coastal areas.
A wider range of temperatures typically exist inland away from bodies of water. If not for the vast oceans on earth tempering the climate life would not exist. This property combines with the MPIBP property to create the water cycle which supports life on earth. Water has an extraordinarily high heat of vaporization. On average it takes calories to convert one gram of water into water vapour.
A value that is higher than any other common substance. This property is of important significance to animals in regulating body temperature because of the large amount of body heat that is required to evaporate water sweat. Without this property of water, organisms would overheat and die and the climate would be thrown into chaos.
Water has the highest surface tension of any other liquid except Mercury. Surface tension is the attractive force exerted by the molecules below the surface on those at the liquid-air interface. The liquid is restrained from flowing by this inward force. The exceptionally high surface tension of water is due to the hydrogen bonding of water. This is demonstrated when you see an insect being able to support itself on the surface layer of water.
This is known as the clumping effect like the high melting point and boiling point the clumping effect occurs in liquid, that have hydrogen bonding.
Conclusion All of these unusual properties stem from the unusual structure and bonding patterns of the water molecule. The molecule is strongly polar because of its uneven distribution of electrons.
Water is one of the basic necessities of life. We require plenty of water every day for drinking, cooking and washing. It is necessary also for cleanliness of homes and hospitals.
Introduction Water is an essential ingredient for the existence of life as we know it. Biochemical processes occur in aqueous environments, many of which use.
Essay about Water. Why Water Is So Important for Life? Water is often considered to be one of the most important resources our planet has, and rightly so. Although people don’t need to be surrounded by water all the time, we shouldn’t forget that a human being can . The importance of water on life essaysWater has many roles in living organisms and life on earth is impossible without it. It makes up between 60% and 95% of the fresh mass of the organisms. In a water molecule, two hydrogen atoms are joined to an oxygen atom by covalent bonds. This makes it a stabl.
April 30 Essay on Water Published by admin at am under Example Essays Introduction Water is an essential ingredient for the existence of life as we know it. Apr 26, · 'Water' is one of the natures precious gifts to mankind. All living things consist mostly of water eg. the human body is of two thirds of justappclose.tk: All Essay.