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High air pressure

  • Moves from West to East across the United States
  • Measured with a barometer
  • Displayed on a weather map with isobars (lines of equal air pressure)

Low air pressure

Low air pressure

  • Moves from West to East across the United States
  • Measured with a barometer
  • Displayed on a weather map with isobars (lines of equal air pressure)
  • Warm air
  • Rising air (less dense)
  • Rainy weather
  • More moisture

High air pressure

  • Cooler air
  • Sinking air (more dense)
  • Nice weather
  • Less moisture
  • What does the letter H refer to?
  • The numbered lines on the weather map connect locations with the same (temperature, pressure, wind speed)
  • What type of weather will the low pressure bring?

What are high and low air pressures?

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