# Oldest rocks on earth radiometric dating successfulonlinedating101

Once the rock cools it is assumed that no more atoms can escape and any daughter element found in a rock will be the result of radioactive decay.The dating process then requires measuring how much daughter element is in a rock sample and knowing the decay rate (i.e., how long it takes the parent element to decay into the daughter elementâ€”uranium into lead or potassium into argon). Half-life is defined as the length of time it takes half of the remaining atoms of a radioactive parent element to decay.That is, billion-year half-lives can be measured statistically in just hours of time.The following table is a sample of different element half-lives.However, rather than accept the biblical account of creation, many Christians have accepted the radioisotope dates of billions of years and attempted to fit long ages into the Bible.

We can use scientific techniques in the present, combined with assumptions about historical events, to estimate the age.

If we walk into a room and observe an hourglass with sand at the top and sand at the bottom, we could calculate how long the hourglass has been running.

By estimating how fast the sand is falling and measuring the amount of sand at the bottom, we could calculate how much time has elapsed since the hourglass was turned over.

Therefore, there are several assumptions that must be made in radioisotope dating.

Three critical assumptions can affect the results during radioisotope dating: Radioisotope dating can be better understood using an illustration with an hourglass.