because it gives a accurate age of rocks and other things found in the earth
carbon 14 half life is in the thousands of years while uranium is many millions of years ;
Uranium isotopes, especially uranium-238, are commonly used in radiometric dating because of their long half-lives, allowing for the dating of rocks and materials that are billions of years old. In contrast, carbon-14 has a much shorter half-life, making it ineffective for dating ancient geological samples. By measuring the ratios of uranium to stable lead isotopes, scientists can accurately determine the ages of rocks and Earth itself.
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