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2807076
Water
Descrição
The formation of hydrogen bonds and properties of water that make it useful for living organisms
Sem etiquetas
biology
water
ocr
biology
bio molecules, food, health and biodiversity
a-level
Mapa Mental por
beccy.booster
, atualizado more than 1 year ago
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Criado por
beccy.booster
quase 9 anos atrás
14
1
0
Resumo de Recurso
Water
H bonds
O has partially -ve charge H had partially +ve charge
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
evaporation is (efficient) cooling mechanism
E.g panting in dogs cools them
ice, is less dense than water / floats
(surface of) ice provides habitat for, organisms e.g. polar bears
high specific heat capacity / large amount of energy needed to, raise / change, temperature
(thermally) stable environment for, aquatic / named aquatic, organisms
(aquatic) organisms use less energy on temperature control
4 (internal) temperature of organisms changes only slowly
(biological) reactions / enzymes / metabolism, function(s) correctly
water (beneath ice), insulated / remains liquid / doesn’t freeze
(aquatic) organisms, do not freeze / can still swim
(effective) solvent
medium for reactions / (internal) transport medium / able to dilute toxic substances
cohesion / adhesion
allows formation transpiration stream / apoplast movement
surface tension
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
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