The Final Version of the Poly Density Bottle

Hi, just want to update that my student have come out with the design of the poly density bottle (with the help of their mentor). To make it interesting, they actually made 4 bottles with a theme of four season. So each bottle the colour of the plastic is link with either Spring, Summer, Autumn or Winter. Behind each bottle, the students also pasted pictures from magazine to suit its theme.

What I am proud of them is that, the group win a special mentioned prize, as the judges say it is very creative and is also look like an artistic piece that shows a science theory. Even though they are not the top 3, however the other winner are from Raffles Institute and Hwa Chong which are those top schools of Singapore, so we are really proud to win that prize.

The theory is still the same, once shake, the density of the mixture will cause 1 kind of plastic to sink another type will sink. However once the propanol and salt water is separated, the float plastic will sink to the middle and the sink plastic will float to the middle. Now have a look at their final version.