Water - for each of the following points

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• Water - for each of the following points
• explain why this property of water is important
  to living things and
• give a specific example .
• Water is an excellent solvent - water makes up m
  ost of the blood plasma cytoplasm- dissolves a
  wide range of other molecules eg --hormones,
  proteins, sugars, salts
• Water heats up slowly. - so rivers and seas stay
  a more constant temp.- helps avoid denaturing
  of enzymes etc.- slows rate of heating up in
  cells.
• Water forms Ice when it freezes
  - ice is less dense than water, so floats on
  lakes in winter, insulates lakes, stops them
  freezing solid- allows aquatic life to survive
• Evaporates taking lots of heat energy with it.
  - allow homeothermic organisms to maintain a
  constant temp.- sweat takes lots of heat energy
  with it when it evaporates.
• Water is transparent
• High Surface Tension
• Acts as a pH buffer.

2
Draw the structure of a water molecule....
Annotate the parts of the molecule which
are responsible for the properties described on
the previous slide.
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