Plate Techtonics/Geologic History Crossword
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
                                      
 
 
Down: 1) rigid outer layer, includes the crust and upper mantle3) Circular movements of heated material in the mantle that cause plates to move5) part of the mantle that flows and moves techtonic plates7) where earthquakes occur; plates slide past each other (san andreas fault)9) supercontinent that rboke apart into today's continents.10) a deep area in the ocean where old crust sinks back into the mantle12) solid iron and nickel due to extreme pressure14) liquid layer of iron and nickel; responsible for Earth's magnetic field Across: 2) theory that explains movement of Earth's plates4) process where oceanic crust sinks under continental crust6) patterns in the ocean floor rocks that show Earth's magnetic field has reversed over time8) crust is destroyed or folded; plates collide; forms mountains (himalayan mountain)11) new crust is formed; plates move apart; forms mid-ocean ridges and rift valleys (Mid-Atlantic Ridge)13) an underwater mountain chain where new crust is created15) the scientist who proposed the theory of seafloor spreading16) the process where new oceanic crust forms at mid-ocean ridges and moves outward17) the thin, outermost layer of Earth18) thick layer of solid rock that flows slowly; drives plate motion
 

 

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