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Air Pressure and Wind

Air Pressure and Wind. Warming air molecules causes them to move faster and spread out. This causes air pressure to change. Air molecules in cold air exert more pressure than warm air because the molecules are close together and collide more often.

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Air Pressure and Wind

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  1. Air Pressure and Wind • Warming air molecules causes them to move faster and spread out. This causes air pressure to change. • Air molecules in cold air exert more pressure than warm air because the molecules are close together and collide more often. • When denser (heavier) air moves toward less dense (lighter) air, it creates wind. • Warm air rises because it is less dense (lighter). • Rising air is an updraft, while sinking air is a downdraft. • Rising warm air and sinking cool air form a circular pattern of wind called a convection cell. These form because of unequal heating and cooling of the air.

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