Which stratigraphic principle is most frequently used to determine relative age among different kinds of geologic events

(1) which phrase describes an important agricultural change that occurred during the mississippian period? (a) first cultivation of wild grains (b) expansion of marsh elder farming (c) spread of corn agriculture (d) gathering of nuts and berries (2) which group of native americans use northwestern arkansas as it’s traditional hunting grounds? (a) osage (b) quapaw (c) woodland (d) caddo

The covers all of earth like a thin shell, but it is not a solid sheet of material. it is broken up into several large sections and many smaller ones. fill in the blank.

Which statement best describes how chemical equations demonstrate conservation of mass?