We have been learning about chemical and physical changes in science. A physical change can be undone like mixing ingredients together, you could go back and sift out the ones you want and separate them again. Whereas a chemical change changes the ingredients into something else. When you bake a cake you cannot then separate the ingredients from each other.
We made sherbet in class and experimented on the chemical change that happened in our mouths when the citric acid mixed with the baking soda which is a base.
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