... mass is bigger and there is more water in the potato this would make my test unfair and upset my results. This is one of the most important variables. To ensure it is a fair test I will cut the potatoes evenly and make sure they are the same length to the nearest millimeter. * Type of potato We must make sure we use the same type of potato as some potatoes could contain more water than other kinds, which could lead me to getting the wrong results. * Amount of solution This also is very important that I make sure all the solutions are the same amount so that each potato goes in, in the same conditions as the others. Therefore I will measure the solutions very carefully and accurately. If the volume of solution is higher or lower than the other then this may affect the pattern of results later on. * Temperature ...

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