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Science voab ch.11
Movement in the Atmosphere ch.11
| Question | Answer |
|---|---|
| A large body of air covering hundreds or thousands of square kilometers that has a relatively uniform temperature, pressure, and humidity. | Air mass |
| In meteorology, a region with relatively uniform temperature and humidity over which air masses form. | Source region |
| Anair mass that is warmer than the surface over which it moves. | Warm air mass |
| An air mass that is colder than the surface over which it moves. | Cold air mass |
| A zone of contact between two dissimilar air masses where neither is advancing. It usually results in no change in the weather for several days. | Stationary front |
| The advancing surface of a warm air mass as it pushes against and over a cooler air mass. | Warm front |
| The advancing surface of a cold air mass as it moves under a warmer air mass. | Cold front |
| A line of violent thunderstroms that sometimes accompanies an advancing cold front. | Squall line |
| A front formed when a cool air mass and rapidly moving cold air mass trap a warm air mass between them. The warm air mass is lifted, losing all contact with the ground. | Occluded front |
| A regional wind system that reverses periodically, alternately bringing wet and dry seasons. | Monsoon |
| The horizontal force exerted on a mass of air that has a higher pressure on one side than on the other. | Pressure gradient force |
| A high-altitude wind that is conprosses of the solid part of the earth. | Geostrophic wind |
| In general, a weather system centered on a low-presurre area surrounded by a wind circulation pattern spiraling counterclockwise in the Southern Hemisphere. A hurricane in the Southwestern Pacific and Indian Ocean regions. Or an tornado. | Cyclone |
| An area of relatively higher atmospheric pressure. It typically contains a clockwise-rotating wind system in the Northern Hemisphere. | Anticyclone |
| A high-speed meandering wind current, usually flowing from west to east at altitudes of 15 to 25 km (10 to 15 mi). Its speed often exceeds 400 km/h (250 mi/h). | Jet stream |
| A breeze that blows onshore from the ocean, usually during the daytime. | Sea breeze |
| A breeze that blows from shore to sea, usually at night. | Land breeze |
| A breeze that blows up the mountainside from the valley when high air on the mountain heats and rises. Usually occers late in the day. | Valley breeze |
| A breeze that flows down from the mountain into the valley at night that is caused by cooling air at higher elevation. | Mountain breeze |
| Consistent winds extending from the Coriolis effect into easterlies. They were formerly used by sailing ships to go from Europe to North and South America. | Trade winds |
| Winds blowing consistently from southwest to northeast between 30* and 60* north and south laitudes. | Prevailing westerlies |
| Winds blowing consistently from norhteast to southwest from the northern parts of North America, Asia, and Europe. | Polar easterlies |
| A permanent low-pressure belt of usually windless air near the equator caused by the vertical rising of warm air. | Doldrums |
| Bands of nearly permanent high pressure at approximatelly 30* north or south latitude caused by descending cold air. They were so named because sailing ships that drifted for weeks in these areas were forced to eliminate their cargoes of livestock when w | Horse latitudes |
| The prevailing low-pressure belt at approximately 60* north or south latitude. In the Northern Hemisphere the prevailing westerlies rise above the polar easterlies, lifting air in this zone. | Subpolar low |
| An area of high atmspheric pressure at either pole caused by subsiding cold air. | Polar high |
| A rainstorm that includes lighting and thunder. | Thunderstorm |
| A towering cumulonimbus cloud that builds rapidly to high altitudes (approaching 7600 m or 25,000 ft) and usually brings heavy rain, lighting,thunder, and sometimes hail. | Thunderhead |
| An electrical discharge that occurs either between clouds or between a cloud and the ground. | Lightning |
| Prior to a lightning stroke, a zigzag column of highly ionized air that establishes the channel for subsequent lightning discharges and return strokes. | Stepped leader |
| A lightning discharge from the ground up to a cloud along the ionized path taken by the original strike from the cloud to the ground. | Return stroke |
| Lightning consisting of branches connected to the main stroke. | Forked lightning |
| A violet, narrow, rotating, funel-shaped local windstorm containing the highest wind speeds measured, extending down from a cumulonimbus cloud. | Tornado |
| A tornado that occurs at sea. | Waterspout |
| In the Atlantic and Eastern Pacific oceans, a strong, large-area cyclonic storm with wind speeds exceeding 117 km/h (73 mi/h). Also called a typhoon or cyclone in other parts of the world. | Hurricane |
| What hurricanes are called in the Western Pacific and Indian Ocean regions. | Typhoon |
| In general, a weather system centered on a low-pressure area surrounded by a wind circulation pattern spiraling counterclockwise in the Southwester Pacific and Indian Ocean regions. | Cyclone (hurricane) |
| The cirular center of low pressure in a hurricane that is characterized by few clouds, relative calm, and vertical air movement. | Eye |
| The larger-than-normal surface waves that proceed outward from a slow- moving hurricane. | Storm swell |
| A lage increase in sea level along the shore in front of and below a hurricane as high winds pile water up against the land, often causing catastrophic flooding and ersion. It is the differnce between the measured sea level and the tide caused by just th | Storm surge |
| A metalrod attached to the highest point of a building that prevents damage to the building from a lightning strike by conducting the eletrical discharge through cables to the ground. | Lightning rod |
Created by:
Shannon14
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