Rumble.In "Digging Deep" (p. 16), you learned that scientists use the Richter scale Richter scale (rĭk`tər), measure of the magnitude of seismic waves from an earthquake, devised in 1935 by the American seismologist Charles F. Richter (1900–1985). to describe the amount of energy released during an earthquake earthquake, trembling or shaking movement of the earth's surface. Most earthquakes are minor tremors. Larger earthquakes usually begin with slight tremors but rapidly take the form of one or more violent shocks, and end in vibrations of gradually diminishing force . The scale starts at 1 and grows by powers of 10. That means an earthquake registering 2 on the scale which could cause trees to sway or create small ripples in a pond--is 10 times more powerful than a magnitude-1 earthquake. And a magnitude-6 earthquake--which could cause walls to crack or loose bricks to tumble--is 100,000 times stronger than a quake Quake - A string-oriented language designed to support the construction of Modula-3 programs from modules, interfaces and libraries. Written by Stephen Harrison of DEC SRC, 1993. registering 1 on the Richter scale. Below is a chart showing the number of earthquakes in the United States United States, officially United States of America, republic (2005 est. pop. 295,734,000), 3,539,227 sq mi (9,166,598 sq km), North America. The United States is the world's third largest country in population and the fourth largest country in area. between the years 2000 and 2004, and the different strengths that they measured on the Richter scale. Use the information from the chart to complete the sections that follow. A. GRAPH IT! On a separate sheet of paper, use the above data to construct the following: 1. A bar graph showing the number of earthquakes for each Richter scale measurement during the year 2001. 2. A line graph In graph theory, the line graph L(G) of an undirected graph G is a graph such that
Hint: Use the x-axis See x-y matrix. for the year, and the y-axis See X-Y matrix. for the number of earthquakes. B. ANALYZE THE DATA 1. At what magnitude were the greatest number of registered earthquakes in 2000? How many of those earthquakes were there that year? 2. According to according to prep. 1. As stated or indicated by; on the authority of: according to historians. 2. In keeping with: according to instructions. 3. the data table, which year experienced the greatest number of earthquakes? How many earthquakes were there that year? 3. Over the years, the Years, The the seven decades of Eleanor Pargiter’s life. [Br. Lit.: Benét, 1109] See : Time highest number of earthquakes registered at what magnitude? 4. Of the years featured, what is the general trend between the magnitude and the number of earthquakes? TAKE IT FURTHER Perform research to find the number and magnitude of earthquakes worldwide for the year 2002. Then, create a bar graph to compare U.S. and global earthquake data for that year. Analyze The Data 1. The greatest number of earthquakes measured 3.0-3.9 in 2000. There were 913 earthquakes of that magnitude that year. 2. The most earthquakes occurred in 2002. There were 3,369 earthquakes that year. 3. Over the years, the highest number of earthquakes registered between 3.0-3.9. 4. Between the magnitude levels of 1 and 3.9, the number of earthquakes gradually increased. Then, above the magnitude 3.9, the number of earthquakes gradually decreased. Take It Further: For help, see neic.usgs.gov/neis/eqlists/eqstats.html The Number of Earthquakes in the U.S. of Various Magnitudes Magnitude Year (Richter Scale Measurement) 2000 2001 2002 2003 2004 8.0-9.9 0 0 0 0 0 7.0-7.9 0 1 1 2 0 6.0-6.9 10 5 5 7 2 5.0-5.9 60 45 70 54 25 4.0-4.9 287 294 538 541 283 3.0-3.9 913 834 1,525 1,303 1,364 2.0-2.9 657 646 1,228 704 1,336 1.0-1.9 0 2 2 2 1 |
|
||||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion