the stable isotope that results from radioactive decay
the time needed for half of a sample of radioactive substance to undergo radioactive decay
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
an atomic nucleus that is undergoing decay
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
the process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element
the method used for absolute dating
uses information about rock layers and the fossil record to determine the age relationships between rocks
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.