1. When Styrofoam packing peanuts are immersed in acetone (the primary component in some nail-polish removers) they dissolve. If the acetone is allowed to evaporate, a solid remains. The solid still consists of Styrofoam, but now it is solid and much denser. Explain. (Hint: Remember that Styrofoam is made with foaming agents.) Answer: Acetone dissolves the polymer which enables the gas of the foaming agent to escape. Since the gas has been removed, the polymer collapses on itself and become more dense. […]
Author: Teo Yee
----Year 4 Mathematical Science Student
I learnt that Ozone is a compound made up of 3 oxygen molecules. It has an acrid smell and it affects the respiratory system. It is a secondary pollutant and it comes from lightning or electrical arching.