This is Joules in Year 6 taking part in a science investigation.
He was making universal pH indicator from red cabbage. He learnt that red cabbage has a chemical (flavin) that changes colour depending on the pH of a liquid. Joules and his dad extracted the red cabbage dye and soaked a piece of paper and let it dry. Once it was dry, they tested a number of chemicals to see the change of colour. They found that it turns pink for lemons and vinegar, stays the same for water but changes green for washing powder. Pink was an indication of an acidic chemical, no change for a neutral and green for an alkali.
What science have you done at home? Please e-mail your class teacher with photos and write-ups.
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