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The half-lives of several radioactive isotopes are known and are used often to figure out the age of newly found fossils.Different isotopes have different half-lives and sometimes more than one present isotope can be used to get an even more specific age of a fossil.However, rocks and other objects in nature do not give off such obvious clues about how long they have been around.So, we rely on radiometric dating to calculate their ages.Perhaps the most widely used evidence for the Theory of Evolution through Natural Selection is the fossil record.The fossil record may be incomplete and may never fully completed, but there are still many clues to evolution and how it happens within the fossil record.Benefits to using a free online chat rooms without any additional fees for the present site of the world trade.
Half-life is defined as the time it takes for one-half of a radioactive element to decay into a daughter isotope.
Free 5-day trial Radiometric dating is used to estimate the age of rocks and other objects based on the fixed decay rate of radioactive isotopes.
Learn about half-life and how it is used in different dating methods, such as uranium-lead dating and radiocarbon dating, in this video lesson. As we age, our hair turns gray, our skin wrinkles and our gait slows.
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