How is thinking a chemical change?

Answer 1

When you think, your body releases chemicals into the brain, those chemicals trigger neurons to go off and helps make decisions, emotions, and ideas pop up. When you are happy, for example, your body releases dopamine into your system and your brains neurons pick it up and translate the dopamine to an electrical charge firing through those neurons. If you think about it (no pun intended) a chemical change is described as a substance(s) changed to form another substance(s) with different properties, and also you cannot change the new substance(s) back through a physical change. I hoped this answered your question.