Chemical Changes

Chemical changes happen all around us. It can be when the leaves change, rotting food, or when things start to smell differently than how they did before. Chemical changes happen when you combine two or more substances and they transform into another substance. The new substance has new physical and chemical properties. Reactions can include ions, compounds or molecules of an element. Single reactions usually are a part of a series of reactions. If you move your arm, the muscles need sugars for energy. The sugars have to be metabolized then used in your arm.

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