12 points how is stratigraphy in determining the age of the earth? justify your response in two or more complete sentences.

the branch of the geology concerned with the order and relative position of strata and their relationship to the geological time scale.

the atomic mass is the bottom number on the element.

-steel jelly

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.