Half lives used carbon dating fossils rocks

Its half-life is only 5,730 years—that is, every 5,730 years, half of it decays away. Thus, carbon dating can’t be used to date rocks or fossils.

You need a device to measure this activity (a thermometer, of which various kinds exist).This is because when radioactive elements first come into being, they are presumed to consist entirely of a single isotope.Imagine that you enjoy a certain kind of ice cream flavored with chocolate chips.Say a second friend who is aware of this arrangement visits and notices that your carton of ice cream contains 70 raisins and 10 chocolate chips.She declares, "I guess you went shopping about three days ago." How does she know this?

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