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Why Is Water So Important To Life?

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WHY IS WATER SO IMPORTANT TO LIFE? Water is one of the most crucial yet common substances on our planet. It comprises over 70% of the earth's surface; Water is everywhere, including the air we breathe. Without it, there would literally be no life. Every single living thing contains water. The element of water is itself so significant that it justifies particular importance. The first components of life are actually thought to have originated from primordial waters. Ever since the beginning, water has been influencing the maintenance of the earth, including the shape - how do you think the world's continents became the figures they are today? Water even helps the earth's climate from becoming excessively hot or cold. While the lands absorb and release heat from the sun much too quickly, the oceans absorb and release slowly. This makes the breezes caused by the ocean make the weather suitable - warm in the winter, and cool in the summer. Unsurprisingly, where water goes, civilization follows. The several great nations today have been upholding due to this sole element. Presently, water demand is progressively high. As development increases, so does water necessity. Even though we do live in a water-based world, 97% of it is situated in the oceans, which is why water-purifying technology is emerging so rapidly. We now know the importance of water generally. ...read more.


partial positive charges, while the oxygen atom (H1) gains negative charges. This makes the water molecule polar which influences the basis of many other water properties. The polarity of water also explains why the substance is at a liquid state at regular temperature and pressure. The polarity of atoms causes molecules to be attracted to each other (positive==>negative and vice versa). This is called Hydrogen Bonding. Hydrogen bonding is quite weak in comparison to regular molecular covalent bonds; however it is responsible for many physical properties of water. Though the bonds between the molecules are loose, they are the strongest when arranged up through the axis of O-H bonds in adjoining links of water molecules. The linkages in ice however have molecules arranged in lattice-like form. Despite this, the randomness of the hydrogen bond link proves to be denser than the structured ice bond. Thus simply, this is why ice floats on water. This means that water expands as it freezes (while most other substances shrink when solidified). Water is most dense at 4�C, which has significant relevance towards lakes and other still water in the winter. When water generally cools on the surface, the cold water (being denser) will sink. However interestingly, beyond the temperature of 4�C, the water on the surface (instead of becoming denser) ...read more.


Though it may not seem to be, this is also quite vital for life to function. Example, when water needs to travel up the xylem through the stems of plants, the intermolecular attraction is able to keep the travelling procession of water together. With another substance with another surface tension, this would not be able to occur. Though it is most obvious that water is a vital element to life, we rarely knew why. We were aware of the basic, common-knowledge material. But did we really know how scientists came about to bring the common-knowledge material? This is what this composition consisted of: The underlying biological truth about the importance of water. In more ways than we can imagine, water is affecting our lives greatly. We have discovered several properties of water's significance: Transparency - for life to grow underwater, Polarity and Hydrogen Bonding - important structure of the molecule that provide the basics, Solvent properties - helping biochemical reactions within the body, Thermal properties - controlling the weather and Cohesion - assisting the development of plants and such. Initially, you may not have truly been convinced of the statement "Without water there would be no life". How about now? Now that you are technically aware, don't you feel a little more value towards the substance that there would be no existence without? BIOLOGY * http://www.gvsu.edu/wri/education/manual/transparency.htm * http://en.wikipedia.org/wiki/Water_%28molecule%29 * http://www.worldofmolecules.com/solvents/water.htm * Handout: Water molecules, water and ice * http://www.uwsp.edu/geo/faculty/ritter/glossary/l_n/latent_heat.html * http://www.sciencebyjones.com/specific_heat1.htm Nisha Kanabar Biology 11/ 11/04 ...read more.

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