Earth History

Created by kkiwacka 

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Daughter Isotope

the stable isotope that results from radioactive decay

Half-life

the time needed for half of a sample of radioactive substance to undergo radioactive decay

Isotope

an atom that has the same number of protons as other atoms of the same element do but that has a different number of neutron

Parent Isotope

an atomic nucleus that is undergoing decay

Radioactive Dating

the process by which the age of a rock is determined by measuring the amount of radioactive isotopes present in the rock or rock sample

Radioactive decay

the process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element

Radiometric dating

the method used for absolute dating

Relative dating

uses information about rock layers and the fossil record to determine the age relationships between rocks

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