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Name: __________________________ Per. _____ Date ______ Why Air Moves: Understanding Temperature, Pressure, and Winds - Differential heating and cooling affects energy transfer to and from the atmosphere - Warn air expands and is less dense. Cool air contracts and becomes denser - Rising warm air and sinking cool air produce convection currents - Dense air produces high-pressure areas; less dense air produces lowpressure areas - Differences in atmospheric pressure cause air to move - Air moving across Earth’s surface is called wind - The larger the pressure difference, the faster the wind Warm air Cool air Surface If warm air is rising up past you, what would happen to the air pressure around you? _____________________________________________________________________________ If cool air is settling on you, what would happen to the air pressure around you? _____________________________________________________________________________