This week 5th class were learning about surface tension (which is the layer of invisible skin on top of the water) this skin stops water overflowing. They predicted and investigated how many coins it would take to break the skin and make it overflow . It took 250 coins. The cloth experiment is when the surface tension acts like a skin on the cloth and ensures water doesn’t immediately spill out when you turn it over but the cloth has to be soaked in water first and tied on with an elastic band. Concentration faces are on here!