Chapter_3_Chart - energetic water mileculs cools a surface Ice floats because it is less dense than liquid water This allows life to exist under

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Chapter 3 Four Emergent properties of water contribute to Earth's suitability for life.  Hydrophyllic substances have an affinity for water. Hydrophobic substances do not. Acidic and basic conditions affect living organisms hydrogen bonding to the slightly positively charged hydrogen of a  nearby water molecule.  Hydrogen bonding of water molecules is the basis  for water's properties.  Hydrogen bonding keeps water molecules close to  each other and this cohesion helps pull water  upward in the microscopic water-conducting cells o  plands Hydrogen bonding is also responsible for water's  surface tension Water has a high specific heat: heat absorbed when  hydrogen bonds break and is released when  hydrogen bonds form. This helps keep  temperatures relatively steady, within the limits that  permit life.  Evaporative cooling is based on water's high heat  of vaporization. The evaporative loss of the most 
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Unformatted text preview: energetic water mileculs cools a surface Ice floats because it is less dense than liquid water. This allows life to exist under the frozen surfaces of lakes and polar seas. Water is an unusually versatile solvent because its polar molecules are attractied to charged and polar substances capable of forming hydrogen bonds. Earth and may contribute to the potential for life to have evolved on other planets A water molecule can transfer an H+ to another water molecule to from H3O (represented by H+ and OH-) The burning of fossil fuels increases the amount of CO2 in the atmosphere. Some CO2 dissolves in the oceans, causing ocean acidification, which has potentially grave consequences for coral reefs. The burning of fossil fuels also releases oxides of sulfur and nirtogen, leading to acid precipitation....
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This note was uploaded on 09/27/2011 for the course BIOL 1301 taught by Professor Smith during the Spring '10 term at Lone Star College System.

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Chapter_3_Chart - energetic water mileculs cools a surface Ice floats because it is less dense than liquid water This allows life to exist under

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