Isotopes decay (half-life) at different, predictable rates. Mathematical formulae have been worked out to show how the percentage of decay in known isotopes can date a particular specimen.
They have been slowly declining over time because they decay, eventually becoming stable isotopes of other elements.
What are two ways that's scientists can study earths climates history
epoch
Geologists have divided Earth's history into manageable units called eons, eras, periods, and epochs. These divisions help scientists study and understand the Earth's geological and biological history over millions of years.
In sedimentary rock.
Historical geology.
Understanding uniformitarianism helps to interpret Earth's past by assuming that the same geological processes that operate today have been shaping the Earth's surface over millions of years. This principle allows scientists to infer past environmental conditions, reconstruct ancient landscapes, and interpret fossil records based on observable natural processes. By applying uniformitarianism, researchers can better understand the long-term geological history and evolution of the Earth.
precambrian era
I don' t know
Derek is a shhlut
to die
because