1. Answer the following questions based on a viewing of the PowerPoint presentation: A. The general cause of earthquakes on a worldwide basis is Plate tectonics? B. Mathematically, the Richter scale is considered to be ______________ rather than linear. So, an earthquake with M=6 releases about how many times more energy than an earthquake with M=5? What would be the energy multiplier if the difference was two magnitude units, that is from M=5 to M=7