PPT-Air Pressure

Defined as the force exerted on you by the weight of tiny air particles in the atmosphere per unit area Earths atmospheric pressure 147 pounds per square inch OR 1 kilogram per square centimeter. 0 For CH OH the normal boiling point is 646 For C OH the normal boiling point is 783 brPage 2br Vapor Pressure and Boiling Point The vapor pressure of a liquid is related to its heat of vaporization vap through the ClausiusClapeyron Equation If P 1 Air molecules are moving constantly! They bounce off everything like rubber balls! They are bouncing off your body and everything around you right now!. Each time an air molecule bounces off an object, it pushes (EXERTS FORCE) on that object. When billions of air molecules bounce off a surface, the force is spread over the area of that surface.. • Pressure gradient controlled by ‘hydrostatic equilibrium’ — pressure supports weight of gas above it, and, because it is gas, density drops with decreasing pressure; combination of effects leads to e-folding drop in pressure over . Air molecules are moving constantly! They bounce off everything like rubber balls! They are bouncing off your body and everything around you right now!. Each time an air molecule bounces off an object, it pushes (EXERTS FORCE) on that object. When billions of air molecules bounce off a surface, the force is spread over the area of that surface.. Key Concepts: What are some of the properties of air?. What instruments are used to measure air pressure?. How does increasing altitude affect air pressure and density?. Key terms:. Density, pressure, air pressure, barometer, mercury barometer, aneroid barometer, altitude. 1. Physics 1. Air Pressure 2. Air Pressure and Altitude 3. Weather Fronts 4. Barometric Pressure 2. Kestrel Altimeters 1. BARO Function 2. ALTITUDE Function 3. Examples 1. Monitoring Barometric Pressu What is air pressure?. Air Pressure: the force exerted by the weight of the air above it. Why does the weight of the air not crush you?. The pressure is exerted in all directions, not just down. (Ruler and newspaper demonstration). Understand the relationship between pressure, force, and area.. Solve problems about pressure.. Investigate the relationship between pressure and depth in a liquid.. Show that air has mass and occupies space.. Weather Systems Unit. By the end of this class, you will be able to:. *Compare and contrast high and low pressure systems. *Identify areas of high and low pressure on a weather map. DO NOW: What’s in a letter?. H is for . “HIGH PRESSURE”. H is for . HEAVY. BLUE = . COOLER. Cool air . contracts. Cool air sinks . because COOL air is HEAVIER. Sunny but slightly cooler weather. Heavy shoves clouds out of the way. 19.1 Understanding Air Pressure. Don’t notice change in your day to day activities. Mostly cause-and-effect relationship. Air pressure causes wind. Wind brings change in temperature/humidity/precipitation. 1. Barometric Pressure. Use your Air Pressure Guide Notes with these slides.. i. The air is made up of molecules.. 2. .. Air molecules are all around us. 3. Like all matter, air molecules have mass.. Vanderbilt Student Volunteers for Science. Training Presentation. Spring 2019. IA. What is the . Atmosphere. ?. Write the following terms on the board: atmosphere, air pressure, vacuum. EVERYONE MUST WEAR GOGGLES!. Earth’s gravitational force. Atmospheric Pressure. As the atmosphere is held down by gravity, it exerts a force upon every surface (pressure = force per unit area). At sea level the force is the weight of 1 kg of air that lies above each square centimeter of the surface (around 15 lbs per in.