By Graeme Davis
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Extra resources for Earthquakes
Earthquakes can easily move heavy objects such as cars and trucks. REAl WoRlD MATH cHAllEngE AnSWERS Chapter One 2004 1964 40 years Page 7 2011 2004 7 years The epicenter is 296 kilometers away. The longest interval is 40 years. 37 8 296 The shortest interval is 4 years. 52 miles. 52 A total of 89 earthquakes were recorded on this day. Chapter Two 3/4 of the earthquakes listed occurred along the Ring of Fire. 48 23 1 2 3 2 3 1 2 2 1 1 89 total earthquakes 9 earthquakes out of 12, or 9/12, reduced to 3/4 California had the most earthquakes (48).
9 earthquakes, making them the most severe. 2 million. 73 = $669,200,000 The 1971 Northridge earthquake cost $103 billion. 50 $30,000,000,000 21st Century skills library r e a l w o r l D m at h : n at u r a l D i s a s t e r s EARTHQUAKES gloSSARY aftershocks (AF-tuhr-shawks) smaller earthquakes that take place after a large one epicenter (EH-pih-sen-tur) the area on the earth’s surface directly above the place where an earthquake strikes evacuate (i-VAK-yoo-wate) to move out of danger friction (FRIK-shuhn) rubbing; the force that slows down objects when they rub against each other geological fault (jee-uh-LAW-juh-kul FAWLT) a tear in the earth where two tectonic plates meet magma (MAG-muh) melted rock found beneath the earth’s surface magnitude (MAG-nuh-tood) the measured power of an earthquake seismograph (SIZE-muh-graf) an instrument that detects earthquakes and measures their power shock waves (SHAWK WAYVZ) ripples that spread out from an earthquake, an explosion, or some other violent event tectonic plates (tek-TON-ik PLATES) huge, thick landmasses that make up Earth’s outer layer they drift atop softer material that lies beneath them triangulation (tryan-gyuh-LAY-shun) a method used to calculate the position of something using distances and angles from two or more other locations tsunamis (tsoo-NAH-meez) large, fast-moving waves caused by an underwater earthquake or volcano vibrations (vye-BRAY-shuhnz) shaking motions foR MoRE infoRMATion BOOKS Benoit, Peter.
See magnitude. S. 8 earthquake of August 2011. He's glad it was a small one! He has written more than 70 books and also works in the video games industry, where he uses his math skills every day.