Water Flashcards

1
Q

How do hydrogen bonds occur between water molecules?

A
  • water is a polar molecule
  • slightly negative oxygen atoms attract slightly positive hydrogen atoms of other water molecules
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2
Q

How is being a metabolite an important property of water?

A

used in:
- condensation
- hydrolysis
- photosynthesis
- respiration

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3
Q

How is being a solvent an important property of water?

A
  • allows metabolic reactions to occur faster in solution
  • allows transport of substances e.g. nitrates in xylem or urea in blood
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4
Q

How is having a high specific heat capacity an important property of water?

A
  • buffers changes in temperature
  • you can gain/lose a lot of heat without changing temperature
  • temperature more stable than land which is a good habitat for aquatic animals
  • helps organisms maintain a constant internal body temperature
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5
Q

How is having a high latent heat of vaporisation an important property of water?

A
  • allows effective cooling by evaporation of a small volume (e.g. sweat)
  • helps organisms maintain constant internal body temperature
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6
Q

How is being cohesive an important property of water?

A
  • supports columns of water e.g. transpiration stream through xylem in plants
  • produces surface tension supporting small animals to walk on water
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