APES UNIT 4 REVIEW accurate Questions and Answers!

APES UNIT 4 REVIEW accurate QuestioEarth's spheres - ANSWER lithosphere, atmosphere, hydrosphere, biosphere Earth's core levels - ANSWER - inner core; solid - outer core; liquid - mantle - asthenosphere - lithosphere (earth's surface) Earth's surface composed of... - ANSWER continental crust and oceanic crust Which is denser, oceanic crust or continental crust? - ANSWER oceanic Plate tectonics theory - ANSWER a model of movement of Earth's crust Convection currents exist in cells in the... - ANSWER lower mantle and the upper mantle (asthenosphere) Wilson Cycle (1960's) Theory - ANSWER Wilson proposed that land masses repeatedly join to form a supercontinent, and then split apart Why are fossil remains significant to proving continental drift? - ANSWER fossil remains provide evidence from continent to continent that they were once connected divergent boundary - ANSWER spreading apart constructive (oceanic lithosphere created) forms ridge/rift volcanic activity (sea floor spreading) Convergent boundary - ANSWER subduction destructive (oceanic lithosphere d ns and Answers!