Relative dating involves radioactive isotopes

The spontaneous decomposition is called radioactive decay.Relative dating of rock involves an approximation of age based on fossil evidence found in a rock formation.The Sun, obviously, is the brightest object in the sky when observed from Earth, so it has the lowest apparent magnitude value of -26.7.The faintest objects that a human eye can detect have apparent magnitudes of about 6.That is an essential part of radioactive carbon dating.Uranium, for instance has a has half life of 5,400 years.Relative dating, meanwhile, measures the order of past events, without determining their absolute age.Radiometric dating--the process of determining the age of rocks from the decay of their radioactive elements--has been in widespread use for over half a century.

This is done with many different radioactive isotopes of elements, each is good for a different age range.

Relative dating is used to determine the relative ages of geologic strata, artifacts, historical events, etc.

A radioactive isotope is an isotope whose nucleus tends to release particles, radiant energy, or both; Radioactive dating is a technique for determining the age of material by measuring the amount of a particular radioactive isotope the material contain.

Geologist determine the age of rocks using radioactive dating.

The radioactive dating relies on spontaneous decomposition into other element.

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Another one would likely be tree-ring dating which only determines the age of trees by how many rings it has.

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