EARTH'S SOLID, ROCKY SURFACE CONTAINING THE CONTINENT

MANY KINDS OF ROCKS FORM, FLAT HORIZONTAL LAYERS

A SUBCONTINENT SPLIT APART INTO PIECES

NEW CRUST IS FORMED AT RIDGES IN THE SEA FLOOR

HOT, MOLTEN ROCK BELOW EARTH'S SURFACE

EARTH'S SURFACE IS BROKEN INTO PLATES ,SLOW SLIDE ACROSS MANTLE

THE LAYER BENEATH EARTH'S CRUST

THE SLIDING OF A DENSER OCEAN PLATE UNDER ANOTHER, COLLIDE

A HUGE CRACK IN EARTH'S CRUST AT OR BELOW THE SURFACE

THE POINT WHERE AN EARTHQUAKE STARTS, ROCK SLIDES PAST EACH OTHER

A VIBRATION THAT SPREADS OUT AWAY FROM FOCUS,EARTHQUAKES HAPPEN

THE POINT ON EARTH'S SURFACE DIRECTLY ABOVE THE FOCUS

SHAKING OF EARTH'S CRUST AFTER THE INITIAL SHAKING, AN EARTHQUAKE

A SENSITIVE DEVICE THAT DETECTS THE SHAKING OF EARTH'S CRUST

THE AMOUNT OF ENERGY RELEASED BY AN EARTHQUAKE

THE CENTRAL OPENING IN A VOLCANIC AREA

GEAT FROM BELOW EARTH'S SURFACE

MAGMA THAT REACHES EARTH'S SURFACE, FLOWS OUT OF VENTS

A DEPRESSION IN THE MOON'S SURFACE FORMED BY IMPACT OF OBJECTS

A VERY HOT PART OF A MANTLE

HOT ROCKS RANGING IN SIZE FROM DROPLETS TO BOULDERS, STEEP-SIDES

LAVA THAT SPREADS OUT AND HARDENS INTO A WIDE, FLAT MOUND

A CONE FORMED FROM EXPLOSION