I am going to investigate the procedure of osmosis by placing slices of potato in water with different volumes of sugar.

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PLANNING

I am going to investigate the procedure of osmosis by placing slices of potato in water with different volumes of sugar.

The variables I used in my investigation are the sugar content in the water, the length, and the weight of the potato slices.

I hope to collect the weights and lengths of the potatoes at the end of the investigation as my variable.

For this experiment, I will be using test tubes for the water solutions and potato slices. To keep these test tubes safe, I will keep them in a test tube rack. I will have to use a ruler to measure the lengths of the potato slices. I will also be using a set of electronic scales to weigh the potato slices before and after the experiment.

I will need to get accurate results, so I will double-check all the variables before and after the experiments.

I predict that the results of my experiment will be that the less sugar content of the solution, the bigger the weight and size of the potato slice. This is because of osmosis, the water from the area of higher concentration will move to the area of lower concentration down a concentration gradient. I think this because of my experience from previous work, such as…

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If a red blood cell were to be put in water, it would burst, as the water would go into it through the process of osmosis. I also know that the potato slices will not burst, as plant cells have thick walls. The potato slice should become turgid.

This is my table of the weights and lengths of the different potatoes before I start the experiment.

OBTAINING EVIDENCE

        I intend to collect the evidence from my experiment, after the potato slices have soaked in the solutions for 24 hours. I will make sure that I collect the ...

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