Plate Techtonics/Geologic History Crossword
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
 
 
Down: 1) where earthquakes occur; plates slide past each other (san andreas fault)3) new crust is formed; plates move apart; forms mid-ocean ridges and rift valleys (Mid-Atlantic Ridge)4) Circular movements of heated material in the mantle that cause plates to move5) part of the mantle that flows and moves techtonic plates6) supercontinent that rboke apart into today's continents.8) process where oceanic crust sinks under continental crust12) the scientist who proposed the theory of seafloor spreading13) patterns in the ocean floor rocks that show Earth's magnetic field has reversed over time16) solid iron and nickel due to extreme pressure Across: 2) an underwater mountain chain where new crust is created7) the thin, outermost layer of Earth9) crust is destroyed or folded; plates collide; forms mountains (himalayan mountain)10) rigid outer layer, includes the crust and upper mantle11) theory that explains movement of Earth's plates14) a deep area in the ocean where old crust sinks back into the mantle15) the process where new oceanic crust forms at mid-ocean ridges and moves outward17) thick layer of solid rock that flows slowly; drives plate motion18) liquid layer of iron and nickel; responsible for Earth's magnetic field
 

 

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