This afternoon in our Science lesson, we used chemical reactions to create new materials.
First, we mixed bicarbonate of soda (50g) with distilled vinegar (50ml). The chemical change creates carbon dioxide which is a gas. This gas is used for fizzy drinks, cooling foods on aeroplanes and is used in fire extinguishers to put out fires.
We then mixed warm milk (250ml) with distilled vinegar (1 tbsp). It looked like the milk curdled. We were all amazed that it made a type of plastic called casein.