Osmosis:Graph, Conclusion and Evaluation
4 Comments, 1 Assist, 1 Answer
Not too sure bout your first bit, that'll be dependant on what it says in your coursework. Both things would be pretty useful, so just to be sure, I'd do both, then when you find out tomorrow, get rid of the other one you don't need to hand in, or maybe keep it if you think it'll get you a few extra marks.
Evaluations, usually things that went well, things that went bad, possible improvements to your experiment, thats all i can give you really
I did the percentage loss/gain, I think.
The scientific theory is fairly easy, do you know anything about diffusion? Osmosis is the movement of water particles across a partially permeable membrane. The particles move from an area of high water concentration to an area of low water concentration. [Emphasis on water particles, not sugar/salt particles].
So, when the cells are put into the solution the water particles move accordingly. If the solution has less water particles than the cell sap in the vacuole [strong solution], then the water particles will move out, making the plant shrivel up and become flaccid.
If the solution has more water particles than the cell sap in the vacuole [weak solution], then the particles will move into the cell from the solution, making the plant cells swell up and become turgid.
Basically for the conclusion, just waffle on about the details, what solutions had the biggest effect, how to improve, keep repeating your scientific knowledge till you're sick of it. Remember to give qualitative [wordy-explanations] and quantative [stick lots of number and values in] responses to the results.
Hope that helps. Just say if there's anything else you need to know.