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MR V U7
WEATHER IN THE ATMOSPHERE
| Term | Definition |
|---|---|
| ATMOSPHERE | THE RELATIVELY THIN LAYER OF GASES THAT FORM EARTH'S OUTERMOST LAYER. |
| AIR PRESSURE | THE PRESSURE CAUSED BY THE WEIGHT OF A COLUMN OF AIR PUSHING DOWN ON AN AREA. |
| ALTITUDE | ELEVATION ABOVE SEA LEVEL. |
| WIND | THE HORIZONTAL MOVEMENT OF AIR FROM AN AREA OF HIGH PRESSURE TO AN AREA OF LOWER PRESSURE. |
| WATER CYCLE | THE CONTINUAL MOVEMENT OF WATER AMONG EARTH'S ATMOSPHERE, OCEANS, AND LAND SURFACES THROUGH EVAPORATION. |
| EVAPORATION | THE PROCESS BY WHICH MOLECULES AT THE SURFACE OF A LIQUID ABSORB ENOUGH ENERGY TO CHANGE TO A GAS. |
| CONDENSATION | THE CHANGE IN STATE FROM A GAS TO A LIQUID. |
| DEW POINT | THE TEMPERATURE AT WHICH CONDENSATION BEGINS. |
| HUMIDITY | THE AMOUNT OF WATER VAPOR IN A GIVEN VOLUME OF AIR. |
| RELATIVE HUMIDITY | THE PERCENTAGE OF WATER VAPOR IN THE AIR COMPARED TO THE MAXIMUM AMOUNT OF WATER VAPOR THAT AIR CAN CONTAIN AT A PARTICULAR TEMPERATURE. |
| PRECIPITATION | ANY FORM OF WATER THAT FALLS FROM CLOUDS AND REACHES EARTH'S SURFACE SUCH AS RAIN, SLEET, SNOW, OR HAIL. |
| AIR MASS | A HUGE BODY OF AIR THAT HAS SIMILAR TEMPERATURE, HUMIDITY, AND AIR PRESSURE AT ANY GIVEN HEIGHT. |
| JET STREAM | BEND OF HIGH SPEED WINDS ABOUT 10 KILOMETERS ABOVE EARTH'S SURFACE. |
| FRONT | THE BOUNDRY WHERE UNLIKE AIR MASSES MEET BUT DO NOT MIX. |
| CYCLONE | A SWIRLING CENTER OF LOW AIR PRESSURE. |
| ANTICYCLONE | THE HIGH PRESSURE CENTER OF DRY AIR. |
| METEOROLOGIST | A SCIENTIST WHO STUDIES THE CAUSES OF WEATHER AND TRIES TO PREDICT IT. |
| STORM | A VIOLENT DISTUBANCE IN THE ATMOSPHERE. |
| THUNDERSTORM | A SMALL STORM OFTEN ACCOMPANIED BY HEAVY PRECIPITATION AND FREQUENT THUNDER AND LIGHTNING. |
| HURRICANE | A TROPICAL STORM THAT HAS WINDS OF ABOUT 119 KILOMETERS PER HOUR OR HIGHER. |
| TORNADO | A RAPID WHIRLING ,FUNNEL-SHAPED CLOUD THAT REACHES DOWN TO TOUCH EARTH'S SURFACE. |
| STORM SURGE | A "DOME" OF WATER THAT SWEEPS ACROSS THE COAST WHERE A HURRICANE LANDS. |
| FLOOD | AN OVERFLOWING OF WATER IN A NORMALLY DRY AREA. |
| DROUGHT | A LONG PERIOD OF LOW PRECIPITATION. |