On 30th June 2023,Taught Centrifugation and Chromatography in 8K and Viscosity in 9 B. used experiments to make the concepts more clear. Used three liquids( Water, honey, oil) to show the difference in there speed of flow and there by viscosity. In 8 K used the wokring model of centrifuge and showed students paper chromatography using filter paper and black ink. Working Model of Centrifuge