The document discusses atmospheric pressure and how it is measured using various instruments like the mercury barometer, aneroid barometer, and altimeter. A mercury barometer uses mercury to measure air pressure, rising mercury indicates higher pressure and better weather while falling mercury means lower pressure and worse weather. A meteorologist is a person who studies weather patterns and forecasts.

1. Pgs. 153-159 For Student Use Only

2. Atmospheric pressure is the gravitational force within the air. Air pressure is the force of air pushing down on you.

3. How do we measure air pressure? Torricelli continued Galileo’s work. He found that the column of mercury could be used to test the weight of the air.

6. Match the terms: Altimeter Aneroid Barometer Siphon Vacuum Mercury barometer Uses mercury to measure air pressure Device that moves fluids from high to low concentration without a pump Measures height or altitude above sea level Barometer without liquid Device that moves air from high concentration to low concentration