Which is not necessarily a way that chemistry impacts people’s lives?

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Idont know. if you want an answer you need to give us some context dude.

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