For those English Class pupils who were lucky enough to be able to attend Fun Monday, there were simple, fun hands-on experiments galore. The first activity was called Magic Milk. We each poured full fat milk into a dish and then added drops of food colouring. Pupils dipped a cotton swab in dish detergent and then touched the surface of the milk. That was when the magic began! Colours swirled and whirled around the plate. We learned that the detergent broke the surface tension of the milk and also dispersed the fat globules which had broken down. To see how this looked in action, follow this link to Magic Milk.
The second activity made use of baking soda, vinegar and food colouring. The pupils used plastic straws like pipettes or droppers. They sprinkled baking soda to cover the bottom of their dish. then they added drops of food colour. Finally they dropped drops of vinegar on the baking soda. The resulting rainbow fizz was fascinating to watch. We learned that this chemical reaction released carbon dioxide which is the same stuff that makes some drinks fizzy.
Finally we made a cool purple liquid from red cabbage and hot water that changed colour when we added different substances in different amounts. First we tore the red cabbage leaves into little bits. Then we poured hot water on the cabbage and waited a few minutes. Everyone was given some purple liquid. Then we slowly added lemon juice to the purple liquid. It turned bright pink! By adding different substances like dish detergent, vinegar and baking soda, we found that we could change the colour of the liquid from purple to pink to a bluish green. We learned about acids and bases and that red cabbage juice is a good indicator of pH. Who says that learning can’t be fun!