Back to School (After June Holidays)

I had my elevator pitch and my talk with Ms Tan some time ago, and now there are many things for me to do. 

1. I need to quantify my results. How to do this? Either use a colour chart, or use the colour picker option in Photoshop. However, using a colour chart might present some difficulty as the chart does not have a unit of measurement. Instead, there are only string of letters and numbers that do not make a lot of sense. Photoshop would seem to be a more ideal choice here, but there are three values Hue, Saturation and Brightness so I have to choose the most appropriate one as my independent variable.  
2. Under the suggestion of Ms Tan, I will repeat my experiment, though slight changes will have to be made. Since I do not have the range of pH anymore, I will have to make do with household products such as vinegar and baking soda. Also, while the duration of the experiment will be kept the same (3 hours), I will take pictures of the set-ups at every half-hour interval. This way, I can make use of this new set of information by plotting a graph which shows the relationship between the hue of the pigment over time while being soaked in a particular pH.
3. After collecting the data and during the analysis of my results, I could categorise my data in the following manner (as suggested by Ms Tan) to make more meaning out of the information:

1. Leaves

• Purple cabbage
• Spinach

1. Roots

• Radish
• Carrot

1. Fruits

• Green pepper (which can then be compared to spinach as they both have chlorophyll)

Since there isn't a lot of time left, I have decided to conduct the new experiment on only purple cabbage and spinach, since purple cabbage displayed the most obvious results previously and both vegetables are leaves. Updating soon!