Choose all words below which describes a unit of measure used in geologic time scale. a) decade b) eon c) epoch d) era e) century f) period

answer; in the united states the plains include the great plains of the west and the tail grass prairie to the south of the great lakes extending east to the appalachian plateau

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement