First News : 2020-08-14

BOREDOM BUSTERS! : 18 : 18

BOREDOM BUSTERS!

18. BOREDOM BUSTERS! Issue 739 14 – 20 August 2020 FirstNews ScienceMus­eumGroup What’s the science? Milk is made up of water, vitamins, minerals, proteins and fats. When the washing-up liquid is added, two things happen. First, the washingup liquid lowers the surface tension of the milk so that the food colouring is free to flow throughout the milk. Second, the washing-up liquid makes the fats and proteins in the milk spread out. This happens very quickly, causing the liquid to swirl. The food colouring molecules bump together, letting us see the activity of the milk. iStock iStock