20. Describe
four properties which render water to be an
important medium for life. [8]
Answer:
. solvent
. water is a polar/bipolar/charged molecule
. solubilizes most of biological molecules/medium for biological reaction/ionic solids/nutrient substances
. due to the hydrogen bonding
. high heat capacity/high latent heat of vapourisation
. good in maintaining against temperature fluctuation/stabilize temperature
. high boiling point
. evaporation leads to cooling effect
high surface tension. solvent
. water is a polar/bipolar/charged molecule
. solubilizes most of biological molecules/medium for biological reaction/ionic solids/nutrient substances
. due to the hydrogen bonding
. high heat capacity/high latent heat of vapourisation
. good in maintaining against temperature fluctuation/stabilize temperature
. high boiling point
. evaporation leads to cooling effect
. formation of plasma membrane/micelle
. cohesion and adhesion forces for movement of water up a capillary
. maximum density of water at 40°C /ice float on water
. water increases in volume and reduces in density as temperature drops
. this ensure aquatic organisms to survive in freezing water/ice is an insulator of heat
. low viscosity
. acts as lubricant //low resistant for movement
Assignment submitted by H. L., Lim, H.P., Tan, S. Y., Tan, H.S., Teow, A.M., Chia 2011/2012 (IBM)
No comments:
Post a Comment