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

Who issued the ruling for the supreme court? dred scott roger b. taney abraham lincoln john c. calhoun

What led to the environmental damage that caused the dust bowl? 1. desert winds emerging from the southwest 2. rotating crops every year and having fallow land 3.overplanting throughout the great plains 4.a year-long drought

The impeachment of president clinton by the u.s. house of representatives occurred with a. virtually all republicans supporting it, while virtually all democrats opposed it b. about two-thirds of republicans supporting it and about two-thirds of democrats opposing it c. half of all democrats and half of all republicans supporting it, while half of all democrats and half of all republicans opposed it d. virtually all democrats supporting it, while virtually all republicans opposed it