The technique called radiometric dating is based on
A. the steady, clocklike decay of certain radioactive isotopes over time.
B. the assumption that radioactive isotopes accumulate in fossils at a constant rate.
C. the formation of radioactive molecules in rocks after they are laid down.
D. the use of fossils of known age to determine how fast carbon-14 decays.
Answer:A
The technique called radiometric dating is based on
A. the steady, clocklike decay of certain radioactive isotopes over time. B. the assumption that radioactive isotopes accumulate in fossils at a constant rate. C. the formation of radioactive molecules in rocks after they are laid down. D. the use of fossils of known age to determine how fast carbon-14 decays.