STEM – Unlocking the Rainbow

Following on from the Skittles posts recently – Candy Experiments and Fun Experiments. We tried this! Well, we tried the rainbow one again, more accurately this time and we got some amazing results. The Skittles in a petri dish worked just as previous blogs said, some of our STEM Club’s results were amazing –

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We tried it with 3 and 5 coloured Skittles (although I realised far too late that there are not 6 colours of Skittles!) and produced a very simple worksheet for colouring in. I love how the colours don’t mix!

Then we did the density rainbow which certainly involves a very steady hand! But some of our groups managed to make it (after I worried hugely that I had made the solutions wrong!)

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I made a huge batch of the different colours – using 100 red skittles, 75 orange, 50 yellow, 25 green and 5 purple – each in 300ml of just boiled water and left them to dissolve for over an hour. I only opted to do it in that order as somebody I know loves the purple flavour so I saved them! In total we opened 3-4 big bags of Skittles, but it was for a full sized class and there are some left.

I even also now have an extension for this experiment, but it’s an Adults only extension! How about a rainbow of Skittles vodka? Any adult want to try it and let me know how it works?