SFSU EARTH 310 Exam Questions and Answers All Correct

SFSU EARTH 310 Exam Questions and Answers All Correct According to the lecture, which definition below would be the best definition of Geology? - Answer-Geology is the scientific study of the Earth, Moon and other terrestrial bodies including its origin and evolution, composition, and the processes that act on them. Choose the best definition for the scientific method below: - Answer-A systematic method that scientists use to aid in understanding phenomenon better. What are the key differences between a scientific hypothesis and a scientific theory according to the lecture? Choose from the following: - Answer-A theory is an accumulation of many well-proven and well-accepted hypotheses that explain why phenomenon occurs. What are the key differences between a scientific theory and a scientific law/principle according to the lecture? Choose from the following: - Answer-A law explains the process of a phenomenon, but not why it occurs like a theory does. According to the lecture, what energy source is Earth using primarily for its internal processes? - Answer-Radioactive decay According to the lecture, what energy source is Earth using primarily for its external/surficial processes? - Answer-Solar energy Which of the layers listed below is defined as a layer by composition? - Answer-Core Which of the layers listed below is defined as a layer by its physical properties? - Answer-Lithosphere Of the choices below, which one represents 100% of the Earth's mantle? - Answer- Asthenosphere, Mesosphere and the ultramafic section of the Lithosphere Which layer from the choices below generates Earth's magnetic field - Answer-Outer Core Which layer(s) from the choices below are defined by physical properties and could be considered a ductile solid? - Answer-Asthenosphere & Mesosphere Which layer defined by physical properties is considered a liquid? - Answer-Outer Core Which statement below best compares the lithosphere to the asthenosphere according to the lecture? - Answer-The lithosphere is a brittle solid and the asthenosphere is a ductile solid Which statement below best compares the crust to the lithosphere according to the lecture. - Answer-he lithosphere is defined by its physical property of being brittle. The crust is defined by its composition (felsic, intermediate and mafic) A long, narrow linear or gently curving deep trench, earthquakes to depths of several hundred kilometers, and volcanoes paralleling the trenches as islands. - Answer-Ocean- Ocean Convergent Boundary A long, narrow linear or gently curving deep trench, earthquakes to depths of several hundred kilometers, and volcanoes paralleling the trenches on continents. - Answer- Continent-Ocean Convergent Boundary A long, linear rise in the sea-floor with earthquakes and volcanic activity found along its ridge. - Answer-The correct answer is: Divergent Boundary A land or seafloor region with many quakes right along the boundary line. Depth of the earthquakes are shallow and the topography is not impressive (no real large mountains or valleys). Volcanic activity is not common along this boundary. - Answer-The correct answer is: Transform Boundary Transform Plate Boundary - Answer-The correct answer is: W Convergent Plate Boundary - Answer-The correct answer is: Y Island or Continental Volcanic Arc - Answer-The correct answer is: U Divergent Boundary - Answer-The correct answer is: X Shallow Focus Earthquakes - Answer-The correct answer is: W, X, Y Deep Focus Earthquakes - Answer-The correct answer is: U Ocean Trench - Answer-The correct answer is: Y Where do earthquake waves originate from? - Answer-The correct answer is: The Focus Which type of wave below can travel through solids and liquids and is similar to a sound wave? - Answer-The correct answer is: P-waves What does the S-P interval represent exactly? Choose the best answer below: - Answer-The correct answer is: It is the time interval between the arrival of the P-wave and the arrival of the S-wave at a seismic station. Eureka, CA: - Answer-The correct answer is: 49 seconds Elko, NV: - Answer-The correct answer is: 72 seconds Las Vegas, NV: - Answer-The correct answer is: 64 seconds It takes an S-wave approximately 70 seconds to travel 300 km. How long does it take the P-wave to travel this same distance? Choose the best answer below - Answer-The correct answer is: 39 seconds Eureka, CA: - Answer-The correct answer is: 478 km Elko, NV: - Answer-The correct answer is: 703 km Las Vegas, NV: - Answer-The correct answer is: 623 km Type in your answers above into the boxes provided on the webpage and hit "Find Epicenter". The next screen will be a map showing circles. What are these circles themselves individually depicting? - Answer-c. The distance between the seismic recording station and the possible earthquake epicenter. Correct Read the section on "Magnitude Explained". What is the magnitude of an earthquake? Choose the best answer from the choices below - Answer-The correct answer is: It is an estimate of the total amount of energy released by an earthquake. The Richter magnitude determination is based on measurements made on seismograms. Two measurements are needed. What are they? - Answer-The correct answer is: Maximum amplitude of the seismic waves and the S-P time interval.