Relier Pairs topic 7 weather part 2 winds and air pressureVersion en ligne match the term to the defintion par Susan Brown 1 lowest zone of the atmosphere where people live 2 horizontal movement of air parallel to Earth's surface 3 easterly moving air at the top of the troposphere; convection cells 4 instrument used to measure wind speed 5 difference in air pressure for a specific distance jet streams wind air pressure gradient anemometer troposphere 1 high wind speeds 2 cause of spinning directions of winds; counterclockwise in southern hemisphere and clockwise in northern hemisphere 3 wind from the direction that is most common at a particular place or season. 4 series of zones where winds move primarily in a specific direction over time; in the Northern Hemisphere to the right 5 low wind speeds 6 extreme weather changes caused by the shifting wind and pressure belts in parts of Asia and India; seasonal very high rain and winds monsoons planetary wind belts steep pressure gradient; close isobars prevailing winds Coriolis effect far apart isobars 1 high pressure with wind blowing away from the center 2 low pressure with wind blowing toward the center 3 in the northern hemisphere highs spin 4 where two air masses of different characteristics meet 5 in the northern hemisphere lows spin 6 large body of air in the troposphere with similar characteristics of pressure, moisture and temperature cyclone anticyclone air mass front counterclockwise toward center clockwise away from center 1 boundary of an advancing cold air mass and a warmer air mass 2 boundary of opposing wedges of cold air masses that lift a warm air mass causing mid latitude cyclones 3 ever-changing boundary between the cold air masses of the poles and the warmer air masses of the equator 4 boundary of an advancing warm air mass and a retreating cold air mass 5 when two adjacent air masses stay in the same place cold front occluded front warm front stationary fronts polar front