it is determined by studying the relative and absolute ages of rocks and fossils
one of these i am not sure witch one though the Quaternary Period the Precambrian time the Phanerozoic Eon the Carboniferous Period
It was laid down when earths oceans first acquired oxygen in the Precambrian
No, geolgic is not a word in English
True
the earths shape and its rotation
This is probably from someone in Mr.Eidem's huh?(;
What are two ways that's scientists can study earths climates history
epoch
Nitrogen
Seismic data
In sedimentary rock.
Historical geology.