chapter 3 water and fitness of the environment

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  1. how much water makes up cells?
  2. cohesion
    is the bonding oh high percentage of the molecules to neighboring water molecules
  3. adhesion
    the bonding of water molecules to other substance other than water molecules, downward pull of gravity
  4. calorie
    is a unit of heat, it is the amount of heat to raise the temperature of 1g of water by 1 degree celsius
  5. heat is ______ when hydrogen bonds break
    heat is _______ when hydrogen bonds form
    • absorbed
    • released
  6. why is the water's high specific heat important to earth?
    • the large body of water can absorb and store huge amount of heat from the sun in the daytime and during night and winter it can release heat to its surrounding
    • it can contribute to keep the temperature balance
    • stabilize ocean temperature
    • many organisms are made out of water, so they are more able to resist changes in thier own temperature
  7. evaporation
    is the transformation from liquid to to a gas
  8. polar molecules are easily dissolve in water because of water's polarity no answer
  9. colloid
    is a mixture where there is a stable suspension of fine particles in the liquid
  11. acid
    is a substance that increase the hydrogen ion concentration
  12. base
    is a substance that reduces the hydrogen ion concentration of a solution
  13. a person can only survive when the blood drops to ___ or rises to ___
    • 7
    • 7.8
  14. buffer
    a substance that minimize changes in the concentrations of hydrogen and hydroxide in a solution

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chapter 3 water and fitness of the environment
2011-12-11 00:49:54

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