The Richter scale is a numerical logarithmic scale developed and introduced by Charles R. Richter in 1935 to measure the amplitude of the largest trace recorded by a standard seismograph one hundred kilometers from the epicenter of an earthquake. Tables have been formulated to demonstrate the magnitude of any earthquake from any seismograph. For example, for a one-unit increase in magnitude, there is an increase of thirty times in released energy. The Richter scale considers earthquakes of 6.75 as great and 7.0 to 7.75 as major. An earthquake that reads 4 to 5.5 would be expected to cause localized damage, and those of magnitude 2 may be left. It is estimated that almost one million earthquakes occur each year, but most of them are so minor that they pass unnoticed. 1. What does this passage mainly discuss? A. Earthquakes B. The Richter scale C. Charles R. Richter D. Seismography 2. In what kind of textbook would this passage most likely be found? A. History B. Biography C. Geology D. Mathematics 3. According to information in the passage, what does the Richter scale record? A.The distance from the epicenter B. The amplitude of the largest trace C. The degree of damage D. The location of the epicenter 4. What is the value of the tables? A.They allow us to interpret the magnitude of earthquakes B. They help us to calculate our distance from earthquakes C. They record all earthquakes D. They release the energy of earthquakes 5. According to the Richter scale, which of the following numbers would indicate that there had probably been damage to the immediate area only? A. 7.0 B. 6.0 C. 5.0 D. 2.0