Barometer

A barometer is a scientific instrument used to measure atmospheric pressure. It helps predict weather changes; for example, falling pressure typically indicates that rain or storms may be on the way, while rising pressure often signals improving weather. There are two main types: mercury barometers, which use mercury in a glass tube, and aneroid barometers, which use a small, flexible metal box. By monitoring these pressure changes, meteorologists can make more accurate weather forecasts, making barometers valuable tools in both professional and everyday settings.