GEOLOGY

Detailed explanation-1: -Also called absolute dating, scientists use the decay of radioactive elements within the fossils or the rocks around the fossils to determine the age of the organism that was preserved. This technique relies on the property of half-life.

Detailed explanation-2: -Answer and Explanation: The known half-lives of radioactive isotopes are used in absolute dating to determine the age of a rock sample. When the igneous rock crystallizes, it traps the unstable isotope. As the isotope decays into its daughter isotope, both the parent and daughter isotopes are trapped.

Detailed explanation-3: -Absolute dating methods measure the physical properties of an object itself and use these measurements to calculate its age. One of the most useful absolute dating methods for archaeologists is called radiocarbon dating. It works by measuring carbon isotopes, which are versions of the element carbon.

Detailed explanation-4: -A half-life is the time it takes for half a given amount of an isotope to decay. Radiometric dating uses the rate of decay of unstable isotopes to estimate the absolute ages of fossils and rocks. Carbon-14 can be used to date recent organic remains.