sentences: the radioactive chlorine sullen of a stone heavy the dog of elemental nucleotide of the child mate & calculating the young of garbage requires fe the copy wolf of the elemental ranges of the child kills ->  calculating the age of rocks requires investigating the radioactive isotope content of that rock  calculating the age of rocks requires investigating the radioactive isotope content of that rock & radiometric owl is a mean of capacity to determine the relative young of the stone ->  radiometric dating requires the radioactive isotope content of a rock  radiometric dating requires the radioactive isotope content of a rock & radiometric log is used to identify / determine the relative young of the stone ->  the radioactive isotope content of a rock can be used to identify the absolute age of the rock  the radioactive isotope content of a rock can be used to identify the absolute age of the rock & the relative young of a stone is the middle of space passed since a stone was formed -> the radioactive isotope content of a rock can be used to identify the amount of time passed since a rock was formed