Earth History and Dating Crossword

radioactive elements are used to determine an
rock layers or fossils are compared to each other based on their position to each other. Younger is above and older is below
the atom that is falling apart (undergoing radioactive decay)
the amount of parent atoms that will be remaining after 1 half life is gone by
a half life is the length of ___ that it takes for half of a parent atom to change into the daughter atom
why a parent element falls apart to a daughter element
the time it takes C-14 to decay to N-14 is called its
the amount of time since the Earth began forming is called ___time
the element that is formed due to radioactive decay is called the
the longer the half-life the more ___ the element