EXPERIMENT IV: SHOWING THAT CHLOROPHYLL IS NECESSARY FOR PHOTOSYNTHESIS Aim: To show that chlorophyll is necessary for photosynthesis. Apparatus and Materials Plant that has variegated leaves, ethanol, beaker, boiling tube, water, heat source, Iodine solution. Method / procedure: - Leave the plant with variegated leaves in light for 2-6 hours. - Remove one leaf and make a labelled diagram to show the green and non-green parts. - Test the leaf for starch. Conclusion: Starch is made only in areas of the leaf with chlorophyll, showing that chlorophyll is necessary for photosynthesis.