This concept was brought up by a fellow named James Hutton who felt that the Earth was much older than a few thousand years.He observed rocks and noticed that changes happen in them very, very slowly.
Scientists used that date to estimate the age of the Earth to be around 4.6 billion years old.
Scientists need to understand radioactive decay in order to absolute date.
Atoms decay by losing a neutron and gaining a proton.
SUSD5 version of the Absolute Dating Lab Purchase this Absolute Dating Activity at Teachers Pay Teachers for 0.60 Cents.
Absolute dating is used to determine the exact date of rocks by using its atoms.