If the average atomic mass of carbon is 12.011, which isotope would likely be found more in nature, carbon-12 or carbon-14?

I mean I would just assume carbon 12 because the decimal is closer to 12 than 14

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.