5. which statement best describes the richter scale? a. it's named after a scientist who studied tornadoes. b. it's a test given to all geologists. c. it's a numerical rating system that measures the largest seismic waves during an earthquake. d. it's a numerical system that measures the smallest seismic waves during an earthquake.

It would be letter C - It's a numerical rating system that measures the largest seismic waves during an earthquake. 

The Richter scale is as a mathematical device to compare the size of earthquakes through a numerical rating system. The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs.

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