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Science chp 6 8th

review for science test 8th grade

QuestionAnswer
Pangaea "all land" giant landmass
Theory of continental drift continents were once joined together in one landmass and have since drifted apart
Alfred Wegener german scientist who developed theory of continental drift
three types of evidence Fossil-mesosaurus; climate-glossopteris; rock- mountain ranges
mid-ocean ridge where magma rises throught the rift valley
rock locations at the mid-ocean ridge newest rock nearest oldest rock farthest away
evidence of seafloor spreading drilling samples, manetic stripes
sonar devise scientist use to map the ocean floor
what drives plate tectonics convection currents
lithosphere crust and upper mantle, floats on asthenosphere
asthenosphere in mantle where convection currents occur
three types of boundaries divergent(plates move apart) convection(plates move together) transform(plates move past each other)
continental/continental mountain forming
continent/oceanic subduction (sometimes volcanoes)
oceanic/oceanic subduction (older, denser one subducts)
Created by: kmm0602
Popular Earth Science sets

 

 



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