PIECES OF THE LITHOSPHERE ARE IN SLOW CONSTANT MOTION.

THE TRANSFER OF HEAT THROUGH LIQUIDS.

THE PULL OF GRAVITY ON A PLATE THAT IS BEING SUB-DUCTED.

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

PLATES MOVE AWAY FROM EACH OTHER

LAND FORM THAT RESULTS FROM A DIVERGENT PLATE BOUNDARY.

UNDERWATER LANDFORM THAT IS CAUSED BY A DIVERGENT PLATE BOUNDARY.

A TECTONIC BOUNDARY WHERE TWO PLATES ARE MOVING TOWARD EACH OTHER.

PACIFIC PLATE RESULTING FROM A CONVERGENT PLATE BOUNDARY

EAST ALEUTIAN VOLCANIC ARC RESULTING FROM A CONVERGENT BOUNDARY

HIMALAYAN MOUNTAINS RESULTING FROM A CONVERGENT PLATE BOUNDARY.

THE PROCESS BY WHICH COLLISION OF THE EARTH'S CRUSTAL PLATES RESULTS IN ONE PLATE'S BEING DRAWN DOWN OR OVERRIDDEN BY ANOTHER

A LONG NARROW STEEP-SIDED DEPRESSION IN THE EARTH'S OCEANIC CRUST, USUALLY LYING ABOVE A SUBDUCTION ZONE

MARIANA TRENCH

A STRIKE-SLIP FAULT THAT OFFSETS A MID-OCEAN RIDGE IN OPPOSING DIRECTIONS.

THE BOUNDARIES BUILD UP ENOUGH ENERGY TO CREATE EARTHQUAKES.

SAN ANDREAS FAULT