Today Piwakawaka looked at what liquifaction is and how it happens. We created a mini liquifaction using corn flour and water, when we mixed the stuff togher it went soft and when we added presure the cornflour and water it turned hard. Next Mrs Hickford told us that the same happens in an earthquake and when the ground shakes all the sandy soil comes to the top, making liquifaction. 
What an interesting lesson. I have never really understood how liquifaction occurs so it was interesting for me to read what you wrote too. I know it makes a terrible mess and thousand of homes in Christchurch were flooded with liquifaction when the earthquakes happened. I think it must stink too?
G Peas xx