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This week in Science, we have been investigating irreversible changes. The children had a fun-filled and hands-on afternoon that included creating blowing up a balloon using vinegar and bicarbonate of soda when they mixed together. They also had the opportunity to fry an egg over a tea-light and discussed how we they could not get the liquid egg back as it was an irreversible change.
One investigation that the children knew about what using mixing Mentos and Coke to create a foam-explosion. The final part of our discovery of irreversible changes was baking biscuits. The children were able to say how they could not get the reactants back, which were the ingredients, and that a product had been made through a chemical change.
Obviously, the children got to taste their final part of the investigation today!