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Biology, 21.04.2021 18:30 Hollywood0122
A. How do radioactive elements help scientists establish how old rocks and fossils are? b. How do index fossils help scientists establish how old rocks and other fossils are? In your answer, include fossils in the same layer of rock, in a lower layer of rock, and in a higher layer of rock compared to an index fossil.
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A. How do radioactive elements help scientists establish how old rocks and fossils are?
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