Water
Dipolar
Oxygen slightly negative
Hydrogen slightly positive
Attracted to the opposite pole on other molecules
Forms hydogen bonds
Specific heat capacity
Hydrogen bonds increase heat capacity
Aquatic enviroments temperature stable
Organisms are mainly water
Buffer to temperatures
A large amount of energy to raise 1kg of water by 1 gram
Cohesion and surface tension
Vaporisation of water
Evaportation of sweat
Effective at cooling
Cohesion
Tendency of molecules to stick together
Hydrogen bonding causes cohesive forces
Can be pulled through tubes
Surface tension
Where water meets air
Creates a skin like barrier
Can support small organisms
Importance to living organisms
Metabolism
Solvent
Hydrolysis reaction
Condensation reaction
Chemical reaction take place in aquatic mediums
Major raw material in photosynthesis
Dissolves CO2 & O2
Wastes such as ammonia and urea
inorganic ion & small hydrophilic molecules
Enzymes who's reaction takes place in water
Important features
Evaporation cools to maintain body temperature
Not easily compressed so provides support
Transparent
Pass through jelly-like substances
Aquatic plants can photosynthesis