Water

Water

H bonds
1. O has partially -ve charge H had partially +ve charge
2. Not strong bonds + can only form with N, F and O
high latent heat of vaporisation / large amount of energy required to change from liquid to gas
1. evaporation is (efficient) cooling mechanism
  1. E.g panting in dogs cools them
ice, is less dense than water / floats
1. (surface of) ice provides habitat for, organisms e.g. polar bears
high specific heat capacity / large amount of energy needed to, raise / change, temperature
1. (thermally) stable environment for, aquatic / named aquatic, organisms
  1. (aquatic) organisms use less energy on temperature control
  2. 4 (internal) temperature of organisms changes only slowly
  3. (biological) reactions / enzymes / metabolism, function(s) correctly
water (beneath ice), insulated / remains liquid / doesn’t freeze
1. (aquatic) organisms, do not freeze / can still swim
(effective) solvent
1. medium for reactions / (internal) transport medium / able to dilute toxic substances
cohesion / adhesion
1. allows formation transpiration stream / apoplast movement
surface tension
1. habitat for invertebrates e.g. pond striders
transparent so allows underwater photosynthesis
is high density so allows flotation/support
organisms can still obtain, oxygen/minerals/food/carbon dioxide from water

Resource summary

	Created by beccy.booster almost 9 years ago