Transcript Document
Earthquake Science Project By: Olivia Holmes and Emma Cyr How many supercontinents did Wegener’s theory have? • It had one supercontinent. • It was called Pangaea. • Map of Pangaea What are the major plates that affect the U.S.? • North American plate • The plate that affects the U.S. is the North American plate. Why do you think California has so many earthquakes but Florida doesn’t? • California is on a transform boundary, so it has a lot of earthquakes. • Florida doesn’t have earthquakes because they are not located in an earthquake zone. In what hazard zone is Illinois located? We are on the New Madrid seismic zone. What is considered to be the most destructive earthquake in history? • It was China’s earthquake. • It was an 8 on the Richter scale. • It was located in China and it took place in 2008. • The Richter scale How many people died? • 32,000 people died from China’s earthquake. • China What are the three basic types of plate boundaries? Convergent plate boundary • A line where two tectonic plates move toward each other into a collision. • These plate boundaries create earthquakes and volcanoes. Divergent plate boundary • A line where two tectonic plates slide away from each other. • They can cause mountain ridges under the ocean and sea-floor spreading. Transform plate boundary • A line where two tectonic plates slide sideways past each other. It creates a transform fault. What are tsunamis, and what causes them? • Tsunamis are huge waves that come onto land. • They are caused by earthquakes on the ocean floor. How fast do tsunamis travel? • Tsunamis travel at approximately 475 miles per hour. What are the two types of energy waves created by an earthquake, and how do they differ? Which type of waves travel faster? Primary and Secondary waves • There are primary waves and secondary waves. • Primary waves travel faster. • Secondary waves are in the inner earth, and primary waves are not. How much more energy is released by a 7.2 earthquake than by a 6.2 earthquake? • A magnitude of a 7.2 earthquake produces 10 times more ground motion than a magnitude of a 6.2 earthquake. • It releases about 32 times more energy than a 6.2 earthquake. What applications does seismology have besides measuring the magnitude and location of earthquakes? Seismology • Reflection and refraction are the two applications in seismology. • They can be used to make evacuation plans. • They can also be used to locate underground hydrocarbons. Where did most of the earthquakes happen last week? Haiti and Chili • The places that had the most earthquakes happen is Haiti and Chili. In Chili, large aftershocks have been nearly continuous since last week. Can scientists predict earthquakes? • Scientists cannot predict the exact occurrence of an individual earthquake. • However they can estimate the probability of a major future earthquake. How do scientists know where an earthquake actually occurred? The use data • collected from as many seismograph stations as possible to perform a calculation. They need at least three seismograph stations. The calculation is called triangulation. Earthquake Science Project • By: Emma Cyr & Olivia Holmes Typing done by Olivia. Research done by Emma and Olivia. Color and animation done by Emma and Olivia. Hope you enjoyed our power point!!!!!!!!!!!!