Examine the effect of placing potato chips into different concentrations of sucrose solutions over a set period of time.

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Taufiq Khan        

GCSE BIOLOGY COURSEWORK 2004-2006

                PLANNING

                        Preliminary Work...................................................        3

Aim.........................................................................        4

Method...................................................................        4        Apparatus...............................................................        5

Diagram.................................................................        6

Accuracy and Reliability.......................................        6

Safety.....................................................................        7

Prediction...............................................................        7

OBTAINING EVIDENCE

Table of Results

First Test........................................................        8

Second Test....................................................        9

Average of two tests.......................................        10

Formulas Used...............................................        10

Graph of % Changes in Mass and

Length vs. % Concentration of Sucrose Solution…        11

                        

                ANALYSING AND CONSIDERING EVIDENCE

                        Conclusion

                                What happened...............................................        13

                                Why it happened............................................        13

                                        

                EVALUATING

                        Evaluation................................................................        15

                        

        Preliminary Work

        

Aim

The aim of this investigation is to examine the effect of placing potato chips into different concentrations of sucrose solutions over a set period of time.

        Method

                

  1. Using a size 6 core-borer, two potato chips of equal diameter were cut out of the potato.
  2. These chips were cut to the same length of 4.5cm using a knife, taking care that no potato skin was included.
  3. Five different concentrations of sugar solutions were prepared by mixing 50% sucrose solution and distilled water, using 100mL measuring cylinders.
  1. 0% sucrose solution

50mL of distilled water

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0mL of 50% sucrose solution

  1. 10% sucrose solution

40mL of distilled water

10mL of sucrose solution

 

  1. 20% sucrose solution

30mL of distilled water

20mL of 50% sucrose solution

  1. 30% sucrose solution

20mL of distilled water

30mL of 50% sucrose solution

  1. 40% sucrose solution

10mL of distilled water

40mL of 50% sucrose solution

  1. The above sucrose solutions were produced and then 40mL of each was poured into four separate boiling tubes which were labelled 0, 1, 2, 3 and 4(representing distilled water, 10%, 20%, 30% and 40% ...

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