The time units used by scientists to divide earth's history are part of the
a. 180° longitude.
b. geologic time scale.
c. 360° latitude.
d. 24-hour model.

What eventually brought an end to the brook farm experiment? a.) george ripley ran out of money to fund it.b.) many former inhabitants spoke badly about it in the press.c.) a fire destroyed the central building of brook farm.d.) the experiment never recovered after a mass exodus of inhabitants in 1848.