Osmosis

By Kimberley Snaith
Had graphics, may need editing.
Contains results table but got scrambled, may need redoing or decoding!!


Osmosis is the movement of water molecules from a high water concentration to a low water concentration, passing through a partially-permeable membrane. A partially-permeable membrane (or semi-permeable) has very tiny holes which allows only certain substances to pass through. This means that water molecules can pass through at a steady flow. The glucose-rich region will collect a high amount of water, acting as if to even up the concentration. Osmosis makes plant cells swell up and become turgid.

I am going to investigate the rate of expansion of a piece of potato using different concentrations of sugar solution. I am going to use six different solutions ~ thus being my input variable. Each solution will have three pieces of potato soaking in it, so I will have a more accurate result at the end. The six concentrations I will be using are:

* Pure...