Why did aristotle's geocentric theory fail to match the expected predictions? a. all stars appear to move in different directions. b. a few celestial objects appear to have retrograde motion. c. all celestial objects periodically exhibit retrograde motion. d. the sun's motion is erratic.

Is this statement true or false? before 1850, workers in american mines, mills, and factories were poorly paid, but their safety on the job was always protected by strict laws.

Which situation would most likely be checked by other branches of the government? a) the judiciary tries to declare a state of emergency. b) the president tries to declare himself commander in chief. eliminate c) the supreme court tries to declare a law unconstitutional. d) the legislative branch tries to declare war on another country.

All of the following are reasons that rome was so strong and powerful except a. rome had excellent soldiers c. they were armed with a gladius and pilum b. they had legions d. they valued education and intellect