Water Flashcards

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1
Q

What does water do?

A
  • it gives support e.g. to plant cells
  • it’s transparent so allows visibility and can photosynthesise
  • ice is less dense than water so ice floats, large bodies of water will not float.
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2
Q

Water is a metabolite

A

It’s in many metabolic reactions including condensation and hydrolysis reactions.

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3
Q

Why is water an important solvent?

A

It’s a important solvent in which metabolic reactions occur and for the transport of ions.

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4
Q

Water has a high heat capacity

A

So lots of energy is needed to heat up water therefore it maintains a stable temperature e.g. in the body.

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5
Q

Water had a large latent heat of vaporisation

A

Lots of energy is needed to break hydrogen bonds, this produces a cooling effect with little load of aster through evaporation e.g. sweating and transpiration.

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6
Q

What is cohesion?

A

Water has cohesion between water molecules therefore water can travel up xylem vessels in unbroken columns.

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7
Q

What is adhesion?

A

Water has adhesion between water molecules and other polar molecules, it aids cohesion. Water is polar.

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8
Q

Water has surface tension

A

Where water meets air, this allows the use of the water surface as a habitat for e.g. pond skaters. Those water molecules in the surface are not affected by molecules above them and therefore pull together more strongly effectively resembling a stretched membrane.

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