GEOLOGY

Detailed explanation-1: -Geologists use radiometric dating to estimate how long ago rocks formed, and to infer the ages of fossils contained within those rocks.

Detailed explanation-2: -The rate of decay of a radioactive isotope is measured in terms of its half-life, or the amount of time required for a material to decrease by one-half. Scientists can use this information to calculate the absolute age of an object containing a particular radioactive isotope such as carbon-14.

Detailed explanation-3: -Radiocarbon dating (usually referred to simply as carbon-14 dating) is a radiometric dating method. It uses the naturally occurring radioisotope carbon-14 (14C) to estimate the age of carbon-bearing materials up to about 58, 000 to 62, 000 years old.