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Study guide EARTH SCIENCE Earth’s solid inner core spins inside the hot, molten metal of which layer? The asthenosphere is part of which layer of Earth? Pressure increases with depth toward the center of Earth. In which layer would you expect pressure to be the greatest? Which layer of Earth is made up partly of crust and mantle material? Overall, which layer of Earth appears to be the thickest? Continental Drift theory OR Sea-floor Spreading Climate clues ___________________ Magnetic alignment of rocks ___________________ Rock formation/mts. Clues ___________________ Glaciers ___________________ Age of rocks (core samples) ___________________ Fossil clues ___________________ KEY TERMS ___The theory that states all continents were once a part of one giant landmass, split apart and slowly moved to there present positions. ___The theory that Earth’s crust and upper mantle is broken up into sections. ___The process that explains how continents move and where new crust is made. ___The name of the giant landmass that was formed 250 million years ago. ___This theory was based on evidence from fossils and rock formations. ___This theory helps to explain the formation and destruction of the Earth’s crust and its movements and collisions. ___The ages of ocean-floor rocks and magnetic stripes on the ocean-floor are evidence of this process. Movements of the crust may be caused by________________ currents within the mantle. The lithosphere is divided into sections called _____________. The places where the sections of the lithosphere meet are called ______________. A ________________ zone is an area where crust is pushed down and melted. True/False-Write the word true, if the statement is correct, or write the word false if the statement is incorrect. ________ The oldest rocks discovered on the seafloor are 180-200 million years old. ________ The youngest rocks on the seafloor are located at mid-ocean ridges. ________ The pattern of magnetic alignment on both sides of a ridge is similar. ________ The Earth’s crust is comprised of 10 lithospheric plates. ________ Evidence of glaciers was used to prove the ocean floor spreads. ________ Oceanic plates are less dense than continental plates. IDENTIFY- plates involved & the proper boundary EXAMPLE ANSWER= CONVERGENT (OC-OC) Forms volcanic mountain ranges (Cascade MTS.) Forms volcanic island chains or arcs (Japan) Forms folded mountains (Appalachian MTS.) The pacific plate and the North American plate (San Andreas Fault-California) Which type of plate boundary occurs at X What feature occurs at Y What is happening at Z? Which type of plate boundary occurs at Y? a. convergent b. divergent c. transform What feature occurs at X Essay- choose ONE A-Were the continents ever joined? Cite landform, geologic, climate, and fossil evidence to support the theory of continental drift. B- Use three forms of evidence to support the theory of sea-floor spreading. Essay- choose ONE A-Were the continents ever joined? Cite landform, geologic, climate, and fossil evidence to support the theory of continental drift. B- Use three forms of evidence to support the theory of sea-floor spreading. Essay- Were Africa and South America ever joined? Cite evidence from landforms, climate, and fossils to support your answer. ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ Make a list of ways the two terms below are different and similar. THINK ABOUT EVIDENCES AND HOW EACH WAS SUPPORTED!!!!!!!!!!!!!!!!!!!! SEAFLOOR SPREADING BOTH CONTINENTAL DRIFT