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Investigating Osmosis in Plants

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Biology Investigation Investigating Osmosis in Plants Experiment We are investigating the effects of osmosis in plants. Osmosis is the process by which water moves through a semi-permeable membrane from a high water concentration to a low water concentration. This process does not require energy therefore is passive. We set up an experiment to test the affects of osmosis in potato chips. We put the chips in different solutions and recorded the results deciding whether they had become turgid cells or plasmolysed cell. With this information we could determine how osmosis effects plants cells. Variables You could change many things to the original experiment. Some things you could of changes are the temperature this might of sped up the rate of osmosis or may have had different effects on the potato chips. You could have changed what was put into the beaker i.e. other vegetables such as carrot or broccoli. This may have had effects on osmosis. You could of stirred the solution to try and make it speed up the rate of osmosis. ...read more.


This means osmosis should take place evenly in turn with the other beakers. > Potato Corer - we are using potato corers to measure identical chips of potato so it's a fair test. Otherwise osmosis could happen faster or slower in one of the potato chips compared to the others. > Knife - we are using a knife to cut the potato chips to make them the right size as all the others therefore making it a fair test. > Pen - we are using a board marker to write down on the beakers which sugar concentrations are which so we don't get mixed up when recording our results. > Ruler - we are using a ruler to measure the size of the potato chips before and after the experiment has taken place. This is to see how much if any the potato chips have increased or decreased in size due to osmosis. > Measuring Scales - we are using measuring scales to measure the weight of the potato chip before and after the experiment has taken place. ...read more.


Then we placed three potato chips in each beaker of different solutions and waited to collect the results to see which beaker osmosis had taken place in the most and the least and to see whether osmosis had even happened at all. We put three chips into each beaker instead of one so that we could take the average of the three to make sure that it wasn't a freak result and to make it a fair test. Fair Test I have made the experiment a fair test in many ways these are using a glass beaker this means you can see the experiment more clearly. By using a measuring cylinder, ruler, measuring scales and a knife. These made it a fair test because it made sure all the measurements are equal and the same. Another way of making it a fair test was to place three potato chips in the different solutions instead of one. This is because if one of the readings from the potato chip is unusual then there is another two chips to take the reading from. Sources For information on my investigation and osmosis I looked through some science books and Microsoft Encarta 2000. I found the following picture on osmosis. ...read more.

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