High Pressure: cold air molecules, more dense air molecules, air sinks, clear skies, air moves clockwise, barometer rises, "H" on a map, Anticyclone, air moves downwards and outwards, fair weather, "leaf blower", Low Pressure: warm air molecules, less dense air molecules, air rises, clouds form, air moves counterclockwise, barometer lowers , "L" on a map, Cyclone, air moves inwards and upwards, precipitation occurs, "vacuum cleaner",

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