RADIOACTIVE ISOTOPES ARE UNSTABLE VERSIONS OF NORMAL ELEMENTS.
BECAUSE THEY ARE UNSTABLE THEY GIVE OFF RADIATION TO TRY TO BECOME NORMAL.
THIS PROCESS OF GIVING OFF RADIATION TO BECOEM STABLE IS CALLED RADIOACTIVE DECAYEACH TIME AN ISOTOPE RELEASE RADIATION, IT CHANGES INTO A NEW MORE STABLE ELEMENT.
THE ORIGINAL RADIOACTIVE ISOTOPE IS CALLED THE PARENT ELEMENT.
The first method of finding the absolute age of an object is by examining tree rings.
If we looked at a cross-section ofa tree or log we would notice that all through it are concentric circles radiating out from the center to the bark. Each ring is also different, and the thickness of each ring is representative of the length of the growing season.
It is possible to test radiocarbon dating by using it to put a date on historical artifacts of known date, and to show that it is usually very accurate.
It has also been possible to test Ar-Ar dating against the historical record, since it is sufficiently sensitive to date rocks formed since the inception of the historical record.
The time that has elapsed since certain minerals formed can now be determined because of the presence of a small amount of natural radioactive atoms in their...
Because of the alternation between dark and light sediments we can use each dark band as a marker for one year.
For really old dates we need to use radioactive isotopes.
THE MORE STABLE FORM IT TURNS INTO IS CALLED THE DAUGHTER ELEMENT.
One argument in favor of the absolute dating methods presented in the preceding articles is that they should work in principle.