I know that when something is cold or hot it’s just our sense of when molecules move slower or faster but I don’t understand why that can kill you. Why can something damage you if its molecules just move slower or faster?
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> Why can something damage you if its molecules just move slower or faster?
Because you are also made of molecules, and some of those molecules break if you hit them hard enough. Others bond with other molecules if they can hit each other hard enough. That changes which molecules you’re made of, which changes their properties, which makes them not have the properties they need to have for you to continue to be alive.
For example, your skin is held together by long fibers of a molecule called collagen. If you heat collagen up enough, it breaks into pieces, and you get gelatin instead, which won’t hold your skin together well.
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