Ms Udy showed us a science experiment on Friday that was very tricky to master, but lots of fun! We started by drawing a simple stick figure with a whiteboard marker. We drew them on a shiny surface, like a ceramic or glass plate. Then we carefully poured water over the stick figures, and some of them lifted off the plate and 'danced' on the water! It was really cool!
We learnt that it works because of three properties of the special ink in whiteboard markers:
1. The ink is designed to not stick very hard to a surface (so it can be erased)
2. The ink is lighter than water
3. The ink doesn't dissolve in water (it is insoluble)
We loved blowing on the figures, or jiggling the plate, to make them dance.
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