Summary Students blow bubbles on a plate to observe the colours in a bubble. Can also just look at the colours as bubbles are blown any time. Science content Chemistry: States of Matter, Properties of Materials (K-7) Chemistry: Atoms, Molecules (3-7) Physics: Light and Sound (1) Lessons activity is in Bubbles Materials Bubble mix, about 20ml per student One straw per student One black (paper) plate per student Piece of white paper to show colours better Procedure Pour your bubble mix onto a black plate (about 20ml each). Use a straw to blow as large a bubble as possible (blow long and slow). Look at the colours. Hold a sheet of white paper behind the plate at an angle to see more colours. Why are they there? Made by the layers of soap molecules - refer drawing of structure to explain. (Light is made of many colours - when white light bounces of the first layer and the second layer the colours interact with each other and some colours are taken away leaving the others - called interference). So see all the colours in white light. The colours in oil or on a CD are formed in the same way. Rainbow colours and colours from a prism are also formed from the separation of white light into its component colours, but by a different mechanism (refraction). Grades taught Gr K Gr 1 Gr 2 Gr 3
