weather is the state of the air or atmosphe a given time and place among the conditi
that govern the whather are the temperatur the air pressure the wind the humidity
cloudiness and percipitation such as rain snow of these air temperature has the greatest
effect on weather all weather is caused by the movement of air masses acr land and water
boundaries between warm cold air masses are called fronts weather patterns change with the season
the scientific study of weather is called meteorology meteorologists use many spe devices and instruments to learn about weather a thermometer measures the air pressure
a hygrometer measures the humidity or moisture in the air
in the united states a weather bureau ha kept weather records since 1870 today it issues
daily bulletins on the weather