THE THEORY THAT THE PLATES ARE IN CONSTANT MOTION.

THE FLOW THAT TRANSFERS HEAT THROUGH A LIQUID.

PULLING FORCE EXERTED BY AN OCEANIC PLATE PLUNGING INTO THE MANTLE

NEW LESS DENSE CRUST FORMING AT DIVERGENT PLATE BOUNDARIES PUSHES OLDER CRUST OUT OF THE WAY

TWO TECTONIC PLATES MOVING AWAY FROM EACH OTHER.

LAND FORM THAT RESULTS FROM A DIVERGENT PLATE BOUNDARY

UNDERWATER LAND FORM CAUSED BY A DIVERGENT PLATE BOUNDARY

TWO PLATES MOVE TOWARD EACH OTHER AND COLLIDE

A CHAIN OF VOLCANOS FORMED ABOVE A SUBDUCTION PLATE

ISLAND ARCS FORM WHEN TWO OCEANIC PLATES COLLIDE

A GEOGRAPHIC ARE CONTAINING NUMOROUS AMOUNTS OF MOUNTAINS

ONE TECTONIC PLATE SLIDES UNDER ANOTHER TECTONIC PLATE

A DEEP DEPRESSION IN THE FLOOR OF THE OCEAN

DEEPEST PART OF THE WORLDS OCEAN

WHEN TWO TECTONIC PLATES SLIDE PAST EACH OTHER

A SUDDEN RELEASE OF ENERGY IN EARTHS CRUST CREATIN SIESMIC WAVES

TRANSFORM FAULT THAT EXTENDS ABOUT 810 MILES