Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Biology Experiment - Agar Block Aim: To check how the surface area to volume ratio affects the rate of diffusion in an agar block. Theory: Diffusion: Diffusion is defined as the movement of particles from a region of higher concentration to a region of lower concentration. This can be seen in a cell where gases diffuse through the cell membrane. The rate of diffusion is said to be dependant upon the various factors listed below- * Size of molecules that have to diffuse * Concentration Gradient * The distance across which diffusion occurs * Number of pores/openings * Surface Area and Concentration This rate of diffusion is measured by considering the time taken for changes to physical changes to occur. For example if a red substance is diffusing out of a transparent substance the colour fades as more of the red substance diffuses out. Hypothesis: It is logical to hypothesize that the agar blocks with the largest surface area to volume ratio...

To see the full version of this document, and 145,348 others