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Earth Changes 1

science

QuestionAnswer
lithosphere layer of earth made up of crust and the rigid part of the upper mantle
asthenosphere layer in earths upper mantle that is soft because it is close to melting
tectonic plate one of large moving pieces of earths lithosphere (oceanic/continental)
continental drift hypothesis that earths continents move on earths surface
Pangaea hypothetical super continent that included all the land masses of earth,broke apart 200 million years ago
theory of plate tectonics theory stating that earths lithosphere is broken into huge plates that move and change in size over time
rift valley deep valley formed as tectonic plates move apart,such as along a mid-ocean ridge
magnetic reversal switch in the direction of the earths magnetic field so that magnetic north and south switch
hot spot area where a column of hot material rises from deep within the mantle and heats the lithosphere, causing volcanic activity
subduction when oceanic plate sinks under another plate in Earths mantle
inner core hot solid materials
outer core liquid metals surrounding inner core
mantle (thickest layer) hot rock that is less dense than core
crust thin layer of cool rock----continental and oceanic crust
mid-ocean ridge
convection energy transfer by movement of material
transform boundary
convection current a motion that transfers heat energy in a material
divergent boundary
convergent boundary
continental-continental collision
oceanic-oceanic subduction
oceanic-continental subduction
Created by: holdersc
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