Helpmyphysics

In our science lab the other week we tried a very puzzling experiment. The class added together 40millilitres of alcohol and water. Surprisingly the mixture added up to about 78 millilitres amd not the expected 80 ml.
Like a good science class we tried the experiment a couple of times and yes it still gave us the same result.
We found out that 40ml of water added to 40 ml of alcohol gave 78ml!
Ciara McGhee, Chloe McMullen and Leanne Moan recorded their ideas about this experiment. Have a listen!