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Title: A sample of an ancient sedimentary rock contains slightly less of the isotope carbon-13 than found ... Post by: adreamer on Sep 9, 2017 A sample of an ancient sedimentary rock contains slightly less of the isotope carbon-13 than found in inorganic material. One possible explanation for this is that
A) it was a meteorite that fell from the sky B) some kind of radioactive decay occurred in it in the past C) it used to be at the bottom of an ancient ocean D) some kind of biological activity occurred in it in the past Title: Re: A sample of an ancient sedimentary rock contains slightly less of the isotope carbon-13 than ... Post by: 19Clyde on Sep 9, 2017 Content hidden
Title: Re: A sample of an ancient sedimentary rock contains slightly less of the isotope carbon-13 than found ... Post by: adreamer on Dec 30, 2017 Correct again
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