This half term so far, we have looked at different mixtures (including solutions) and how to separate them and now the children are considering the difference between ‘reversible’ and ‘non-reversible’ changes. In doing so we have come across chemical reactions, that produce a new product and hence are non-reversible. Starting with a simple Vitamin C tablet in water and observing it fizz, we are going onto mixing bicarbonate of soda or baking powder with vinegar or water, to produce carbon dioxide - enough to inflate a rubber glove we hope! Don’t be surprised to hear requests from your children for these items to be on your shopping list! From here we will take a close look at burning, the classic non-reversible change, starting by posing the simple question, ‘How does a candle burn?’.