4. In 1935 seismologist Charles F. Richter devised ..... for rating the strength of earthquakes. For the numerical scale The scale is numerical A numerical scale A scale of numerical

The Richter scale measures the magnitude of a seismograph because it  quantifies the amount of energy released at the earthquake's source, but we can determine the ...... , so we can see how much damage the earthquake will cause.

21. How does the Richter Magnitude Scale calculate its measurements?*1 pointEyewitnessesAmount of damage causedThe amount of time the earthquake lastedThe strength of the seismic waves recorded by a seismograph machine

5.  Which scale measures the magnitude, or size, of an earthquake?*1 pointFujita ScaleSeismoscaleMercalli ScaleRichter Scale

14. Seismic scale used and developed by the Philippine Institute of Volcanology and Seismology to measure the intensity of an earthquake. It was developed as upon a specific response to the 1990 Luzon earthquake.*1 pointMercalli scaleRichter scaleSeismoscalePEIS

6. Scale that is based on observable earthquake damage.*1 pointFujita ScaleSeismoscaleMercalli ScaleRichter Scale