APES UNIT 4 REVIEW verified/passed

APES UNIT 4 REVIEW verified/passed Earth's spheres - correct answer lithosphere, atmosphere, hydrosphere, biosphere Earth's core levels - correct answer - inner core; solid - outer core; liquid - mantle - asthenosphere - lithosphere (earth's surface) Earth's surface composed of... - correct answer continental crust and oceanic crust Which is denser, oceanic crust or continental crust? - correct answer oceanic Plate tectonics theory - correct answer a model of movement of Earth's crust Convection currents exist in cells in the... - correct answer lower mantle and the upper mantle (asthenosphere) Wilson Cycle (1960's) Theory - correct 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? - correct answer fossil remains provide evidence from continent to continent that they were once connected divergent boundary - correct answer spreading apart constructive (oceanic lithosphere created) forms ridge/rift volcanic activity (sea floor spreading)