A straightforward reading of the Bible shows that the earth was created in six days about 6,000 years ago. Radiometric dating uses ratios of isotopes in rocks to infer the age of the rock. Scientists use a mix of observational data and assumptions about the past to determine the radiometric age of a rock.
Definition of ratify for English Language Learners. : to make (a treaty, agreement, etc.) official by signing it or voting for it.
See Article VII (Ratification). Delaware was the first state to ratify the Constitution, on December 7, 1787; the last of the thirteen original colonies to ratify was Rhode Island, on May 29, 1790, two-and-a-half years later.