Please i need help.
What factor reduces the accuracy of radiocarbon dating?

A. Bones and fossilized plants absorb carbon over time.

B. Atmospheric carbon-14 levels change over time.

C. Bones and objects absorb carbon dioxide.

It is 4.92 e-4 sorry if i am wrong

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.

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium