Relative dating,absolute dating, and radiometric dating are the things to talk about. Relative dating determines if an object is younger or older than other objects. Geologists use fossils and rocks to help them understand relative dating. Absolute dating determines the number of years an object has been around. Radiometric dating is the method used for ab solute dating. Radiometric dating is the method of determining the age of an object by estimating the relative number of percentages of a parent isotope and a daughter isotope.