Plate Tectonics Plate Boundaries: Tectonic activity where plates interact by Anne E. Egger, Ph.D. Reading Quiz Teach with this 1. Most earthquakes are located along plate boundaries. in the ocean. on continental crust. on oceanic crust. 2. Earthquakes along divergent boundaries occur only at shallow depths of 0 to 33 km below the earth's surface. true false 3. Why are we able to measure past plate motion using hotspots? Hotspots are relatively stationary, whereas plates move. Hotspots are unaffected by gravity, which drives plate motion. Hotspots only erupt every 1,000 years. Hotspots only erupt when a plate moves. 4. The driving forces behind plate tectonics, a subject that plagued Wegener, continue to be a matter of debate today. Which of the following is NOT a possible cause of plate motion? convection earthquake activity gravity mantle upwelling 5. The Himalayas occur along a convergent boundary where continental crust meets continental crust. continental crust meets oceanic crust. oceanic crust meets oceanic crust. transform motion occurs. 6. When oceanic crust meets oceanic crust along a convergent boundary, which plate is most likely to be subducted? the plate with an island arc the plate with the biggest continent the plate with the oldest crust the plate with the youngest crust 7. The San Andreas Fault in California is an example of what kind of boundary? convergent divergent plate boundary zone transform 8. Why did the distribution of earthquakes and volcanoes help confirm plate tectonic theory? Both earthquakes and volcanoes were distributed randomly. Earthquakes and volcanoes were different along different types of boundaries. Earthquakes and volcanoes were the same along all of the plate boundaries. Neither earthquakes nor volcanoes had been studied much before plate tectonics. 9. Continental crust is _______________________ than oceanic crust. less buoyant more explosive thicker and less dense thinner and denser 10. Which of the three main boundary types is least common? They are all equally common. convergent divergent transform Score Quiz
