Exercise on Radiometric Dating, Overview The view of time related to the universe, Earth and humanity has changed throughout human history, depending on the various data available, and the social and religious beliefs of the time.
This span of time has been subdivided and the units arranged into a geologic time scale.
Radiometric dating methods are the strongest direct evidence that geologists have for the age of the Earth.
All these methods point to Earth being very, very old -- several billions of years old.
The definition of “assumption” First, we have to define “assumption.” At the broadest level, you could define an assumption as something that cannot be proved with 100% certainty, but that is an extremely problematic definition because it makes virtually everything an assumption.
This is the problem that Descartes was describing when he famously proclaimed, “cogito ergo sum” (I think therefore I am).
I think that my question regarding KNM-ER 1470's and the change from previously believed "good dates" from methods other than the fossil record might be too broad.
As I will demonstrate, coral growth rates, radioactive decay rates, etc. Rather, they are the conclusions of simple inductive logic.I found several good sources, but none that seemed both complete enough to stand alone and simple enough for a What is radiometric dating?Simply stated, radiometric dating is a way of determining the age of a sample of material using the decay rates of radio-active nuclides to provide a 'clock.' It relies on three basic rules, plus a couple of critical assumptions.There are about two dozen decay pairs used for dating.Uranium 235 decay to lead has a half-life of 713 million years, so it is well suited to dating the universe.Young-Earth creationists -- that is, creationists who believe that Earth is no more than 10,000 years old -- are fond of attacking radiometric dating methods as being full of inaccuracies and riddled with sources of error.