Which statement could be a direct outcome of the formation of the moon according to the giant impact theory a. earths axis is tilted b. earth moves in a circular orbit c. earth revolves around the sun] d. earth rotates

The giant impact theory suggests that the Moon formed out of the debris left over from a collision between Earth and an astronomical body the size of Mars. The theory describes the formation of the Moon. 
Supporting evidence is that the Earth rotates. Correct D

The Richter magnitude scale was developed in 1935 by Charles F. Richter of the California Institute of Technology as a mathematical device to compare the size of earthquakes. The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs