Name: Victor PaoneLearning Unit 2: Plate Tectonics and Physical Hazards Review QuestionsThis assignment is designed to assess your understanding of Unit 2 and includes some of the Questions for Review at the end of Chapter 2 from your text plus a few additional questions. Each question can be answered in one to two sentences. Please limit yourself to amaximum of three sentences.Access the assignment, complete it with ANSWERS IN A DIFFERENT COLOR FONT as a separate file, and send it back for evaluation and grading through the assignment tab by or before the due date. 1. What forces drive internal and external Earth Processes? Internal - Geological External - Solar, Atmospheric, Spatial2. What energy sources caused the interior of the early Earth to heat up? The proper term is called terawatts which comes from radiogenic heat which is produced by the radioactive decay of isotopes in the mantle and crust.3. List the density stratified layers of the earth from most dense to least dense. Crust, mantle, outer core, inner core4. The lithosphere is composed of what two layers? The crust and the mantle5. Distinguish between Earth’s lithosphere and asthenosphere in terms of both location and properties. The lithosphere contains the crust and the uppermost mantle which is the hard and rigid outer layer of Earth. The asthenosphere is the weaker, hotter and deeper part of the upper mantle which contains 6. Before people understood plate tectonics, what evidence led some scientists to believe in continental drift? Ages of bedrock formations which match across the Atlantic Ocean7. What was the primary reason why Alfred Wegener’s theory of continental drift rejected? He could not provide a satisfactory explanation for the force that pulls and pushes the continents8. What evidence confirmed seafloor spreading? Be brief but to the point Rocks near the mid-ocean ridge were younger than rocks near trenches Matching bands on rocks were changing over timeEarthquake data showed oceanic crust is sinking on to the mantle at trenches9. If the ocean floor is getting wider, why is the Earth not becoming larger? Old ocean floor sinks at subduction zones called trenches10. Why do many oceanic volcanoes occur as long lines of volcanoes that are active at only one end? The lithosphere moves over a stable hotspot in the mantle11. What are the main types of lithospheric plate boundaries in terms of relative motions? Provide a real example of each.Divergent - spreading apartConvergent - collisionTransform - move from side to side12. Why does oceanic lithosphere almost always sink beneath continental lithosphere at convergent plate boundaries? Because it is denser 13. With which type or types of boundary are active volcanoes generally associated? The subduction zones, or convergent boundaries, as well as the divergent boundaries14. How does magma form in the line of arc volcanoes over an active subduction zone? Magma will slowly rise into the crust and reach the surface causing a volcanic arc15. Along which type or types of lithospheric plate boundary are earthquakes common?Convergent, divergent, and
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