The Richter scale is used, from 0.1 to 9.0 magnitude. The Richter scale is determined from the logarithm of the amplitude of waves recorded by seismographs.
I think its B but possibly C
False
mountains form from collision of earths plates
Im not sure what you mean but, <span>Plate tectonics is the theory that the outer rigid layer of the earth (the </span>lithosphere) is divided into a couple of dozen "plates" that move around across the earth's surface relative to each other, like slabs of ice on a lake. the theory can best be described as <span>earth's natural process by which its lithospheric plates slowly move about because of movement in the asthenosphere. </span>
