Science Class Connect Rules • Respect the classroom and our privileges – Do not pollute the chat box – Stay on topic – Science class connects are not free chat sessions • Respect the teacher and your peers – Be appropriate and use good language – Be kind to others – Class connects are a time to learn • Have fun! – Science is cool and full of lots of fun lessons and labs! If you are unable to follow these three rules your privileges will be taken away! JEOPARDY!!!! Which phrase best describes subduction? $100 A. Sinking of one tectonic plate under another B. Movements of tectonic plates across the earth’s surface C. Spreading apart of two tectonic plates D. Collision between two tectonic plates The class says: $100 The answer is: A. Sinking of one tectonic plate under another Which force is responsible for seafloor spreading? $200 A. Gravity in the crust B. Gravity in the mantle C. Convection in the mantle D. Convection in the crust The class says: $200 The answer is: C. Convection in the mantle Which causes seismic waves? A. Movements of the core B. Convection in the mantle C. Movements of the plates D. Gravity in the mantle $250 The class says: $250 The answer is: C. Movements of the plates Where is a rift valley most likely to occur? $300 A.At a convergent boundary between an oceanic plate and a continental plate. B.At a convergent boundary between two continental plates C.At a divergent boundary in a continental plate D.At a divergent boundary in an oceanic plate The class says: $300 The answer is: C. At a divergent boundary in a continental plate Which event is the most common at oceanic-oceanic convergent boundaries? $100 A.Volcanic mountain ranges B.Earthquakes C.Rift valleys D.Island arcs The class says: The answer is: D. Island arcs $100 What do the yellow arrows in this illustration represent? A.Convection in the lithosphere B.Convection in the asthenosphere C.Direction of earth’s magnetic field. D.Movement of earth’s tectonic plates $200 The class says: $200 The answer is: B. Convection in the asthenosphere $100 Which changes occur in the composition of the earth’s layers from the surface to the core? A.The material is hotter and denser B.The material is hotter and less dense C.The material is cooler and denser D.The material is cooler and less dense The class says: $100 The answer is: A. The material is hotter and denser. What feature will form as a result of $400 the movement displayed in the illustration? A. Deep-sea trench B. Transform boundary C. Mid-ocean ridge D. Convergent boundary The class says: The answer is: C. Mid-ocean ridge $400 Which prevented many geologists from accepting Wegener’s theory of continental drift? A. B. C. D. $100 Wegener could not explain how the continents in the Northern Hemisphere fit together Wegener could not explain how similar geological features could be continued from one continent to another. Wegener could not explain how the continents could move through the sea floor Wegener could not explain how similar fossils could be on difference continents. The class says: $100 The answer is: C. Wegener could not explain how the continents could move through the seafloor. Which have scientists learned from studying seismic waves that travel through earth’s interior? $200 A. The crust of the earth is liquid B. There are no finite boundaries between the layers. They mesh into one another C. The inner core of the earth is liquid D. The layers of the earth increase in density as one moves toward the earth’s center The class says: $200 The answer is: D. The layers of the earth increase in density as one moves toward the earth’s center