Radioactive Dating Radioactive clocks Our ancestors measured the passing of time with water clocks or hourglasses. It measures time -like our ancestors - by using hourglasses provided by radioactivity. In the radioactivity hourglass upper part, that gradually empties, are decaying nuclei. CEA Dating hourglasses are used to date the relics of bygone civilizations, by measuring the amount of Carbon, whose decay rate allows for precise age calculations.
Carbon is a radioactive carbon isotope present in the atmosphere, plants and living bodies. Radioactive dating can also be applied to the dating of rocks as old radio active the Earth, of coral and volcanic lava. Other dating methods using the uranium-thorium ratio, for example reveal the amount by which the carbon 14 results need to be corrected.
A good example is the dating of coral.
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One of the most commonly used methods for determining the age of fossils is via radioactive dating (a.k.a. absolute dating). This method involves comparing the.