Indiana University Libraries Moving Image Archive

The atmosphere around us

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Description We live at the bottom of a tremendous sea of air (the atmosphere) much as fish live in the ocean. This sea of air exerts a pressure upon us. A barometer is shown and its use illustrated in measuring atmospheric pressure. Such data are shown in a weather map. The effect of pressure is shown in that hot water is made to boil by “cooling” it, i.e. reducing the pressure above the liquid.