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Surface area and volume ratio
Theory: In this experiment the size and shape of some cells is modelled using agar gel. ...
Aim: To investigate the relationship between the surface area to volume ratio and rate of diffusion, using a model.
Hypothesis: That the larger the surface area to volume ratio, the quicker it is diffuse. This is because there is more surface area for the acid to cover and since the volume ratio is in ‘in more proportion’ to the surface area, there is less amount of agar jelly for the acid to penetrate through.
Variables:
Independent- the size and shape of the agar jelly
Dependant-
• the rate of diffusion of each cube
• the relationship between the surface area to volume ratio
Controlled-
• the amount of acid used
• the type of indicator added into the gel (phendphthalein)
• the amount of indicator used in each cube
• the type of gel used (agar)
Equipment:
• blade
• ruler
• 3 medium beakers
Method:
1.
Approximate Word count = 552
Approximate Pages = 2.2
(250 words per page double spaced)
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