What do scientists use to determine the absolute age of fossils and rocks.? Earth Science Evidence about Earth's Past Absolute Ages of Rocks 1 Answer Konstantinos Michailidis Oct 4, 2015 With radiometric dating. Answer link Related questions What are some of the limits of radiometric dating techniques? What is dendrochronology? What is a parent isotope? What is a daughter isotope? What is electron capture and how is it related to absolute dating? How can half-life be calculated? How do you measure the decay of radioactive isotopes? How can radioactive decay be used to date rocks? What is radioactive decay? How does absolute age differ from relative age? See all questions in Absolute Ages of Rocks Impact of this question 5510 views around the world You can reuse this answer Creative Commons License