Download chapter 10, section 3

SECTION 3
PLATE TECTONICS THEORY
PLATE MOVEMENTS
 EARTH’S CRUST AND UPPER MANTLE ARE IN SECTIONS CALLED
PLATES
 LITHOSPHERE IS MADE OF CRUST AND UPPER MANTLE. IT FLOATS
ON TOP OF THE PLASTIC LIKE ASTHENOSPHERE
PLATE BOUNDARIES AND SURFACE FEATURES
 DIVERGENT BOUNDARY-PLATES MOVE APART, CREATING RIFT
VALLEYS OR MID OCEAN RIDGES
 CONVERGENT BOUNDARY- PLATES COLLIDE FORMING MOUNTAINS
(continental crust hits cont. crust) OR FORM SUBDUCTION ZONES WHERE
VOLCANOES ARE CREATED (cont. crust hits ocean crust or ocean crust hits
ocean crust)
 TRANSFORM BOUNDARY- PLATES SLIDE PAST ONE ANOTHER
CAUSING EARTHQUAKES
CAUSE OF PLATE TECTONICS
 PLATES MOVE BECAUSE OF CONVECTION CURRENTS IN MANTLE.
HOT MAGMA RISES AND COOL MAGMA SINKS, MOVING MAGMA IN
CIRCULAR PATTERN