Labels:aneroid barometer | barometer | book | clock | door OCR: BAROMETERS OU CAN measure changes Dial Fixed pointer atmospheric pressure using an instrumen called barometer Since atmospheric changes affect the weather barometers are also peen to forecast weather conditions. There are two main kinds barome ters: the mercury barometer and the aneroid barometer. The mercury kind is used in weather stations and consists of a tall thin vacuum tube filled with mercury Movable The mercury held in the tube Aneroid barometer pointer by atmospheric pressure and any When the atmospheric pressure pressure chan ges cause variations increases vacuum box inside the in its level. The aneroid barometer barometer is squashed slightly is pesn in the home moving pointer around the dial instrument Moyable iges sligbtly
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