2 Meteorologists use instruments to measure the properties of air. Air hasTemperaturePrecipitationHumidityPressureWind
3 Barometer Scientists use barometers to measure air pressure. The mass of air pressing down on us is 14.7pounds/square inchWhen air pressure is high, the day is clear. Low air pressure means bad weather.
4 Aneroid Barometer Cell volume gets smaller as pressure increases Most commonfor home use