LAYER BENEATH THE MANTLE ABOUT 2260 KILOMETERS THICK; THE OUTER CORE CONTAINS LIQUID IRON AND GENERATES EARTHS MAGNETIC FIELD.

A SMALL EARTHQUAKE THAT FOLLOWS A MAIN EARTHQUAKE.

A LARGE BODY OF AIR THAT IS CHARACTERIZED BY SIMILAR TEMPERATURES AND AMOUNTS OF MOISTURE AT ANY GIVIN ALTITUDE.

THE 2890 KILOMETER THICK LAYER OF EARTH LOCATED BELOW THE CRUST.

THE VIBRATION OF THE EARTH PRODUCED BY THE RAPID RELEASE OF ENERGY.

What isTHE FORCE EXERTED BY THE WEIGHT OF A COLUMN OF AIR ABOVE A GIVIN POINT.

What isTHE RIGID OUTER LAYER OF EARTH INCLUDING THE CRUST AND UPPER MANTLE.

SEASONAL REVERSAL OF WIND DIRECTION ASSOCIATED WITH LARGE CONTINENTS, ESPECIALLY ASIA; IN WINTER, THE WID BLOWS FROM LAND TO SEA. IN SUMMER, THE WIND BLOWS FFROM SEA TO LAND.

THE RATE OF ADIABATIC COOLING OR WARMING IN UNSATURATED AIR. THE RATE OF TEMPURATURE CHANGE IS 1C PER 100 METERS.

ONE OF NUMEROUS RIGID SECTIONS OF THE LITHOSPHERE THAT MOVES AS A UNIT OVER THE MATERIAL OF THE ATMOSPHERE.

A FRONT ALONG WHICH COLD AIR MASS THRUSTS BENEATH A WARMER AIR MASS.

THE CONDITION OF AIR THAT IS MORE HIGHLY CONCENTRATED THAN IS NORMALLY POSSIBLE UNDER GIVIN TEMPERATURE AND PRESSURE CONDITIONS.

A REGION WHERE THE RIGID PLATES ARE MOVING APART, TYPIFIED BY THE OCEANIC RIDGES.

A THEORY OF RAINDROP FORMATION IN WARM CLOUDS IN WHICH LARGE CLOUD DROPLETS COLLIDE AND JOIN TOGATHER WITH SMALLER DROPLETS TO FORM A RAINDOP.

THE RATE OF ADIABATIC TEMPERATURE CHANGE IN SATURATED AIR, THE RATE OF TEMPERATURE CHANGE IS VARIABLE BUT IT IS ALWAYS LESS THAN THE DRY ADIABATIC RATE.