The largest mass extinction in earth's history occurred at the end of which era

South america is located within which hemisphere?

What statement about charlemagne is not true? a. charlemagne's empire collapsed during his rule b. charlemagne sent missionaries throughout europe c. charlemagne encouraged the arts and education d. charlemagne ruled much of western europe a. charlemagne's empire collapsed during his rule

Which soil layers comprise the topsoil? o horizon a horizon b horizon c horizon