PPT-Air Pressure and Wind Chapter 19

191 Understanding Air Pressure Dont notice change in your day to day activities Mostly causeandeffect relationship Air pressure causes wind Wind brings change in temperaturehumidityprecipitation. Three real forces . (gravity, pressure gradient, and friction) push the air around. Two apparent forces . due to rotation (Coriolis and centrifugal). Large-scale flow is dominated by gravity/pressure and Coriolis … . The Atmosphere. Section 2:. Water and Wind. Properties of Air. Even though it appears that air has no mass, air consists of atoms and molecules that, in fact, have mass.. Because air has mass, it also has other properties, including density and pressure.. GREAT WEBSITE LINK FOR MODULES!. https://. www.nc-climate.ncsu.edu. /. edu. /k12/.. eeb. Lesson Objective. By the end of this lesson, you should be able to:. a.) . Describe the main processes of the water cycle. Earliest use of wind power goes back to the development of sailing ships. Larger vessels built in the 19. th. century could extract as much as 10000 hp.. Stationary wind machines were later brought into practice.. atm. layers). _____rise in the global temperature due to an increase in carbon dioxide caused by human . activity (water cycle 2). _____ most energy in the atmosphere is transferred by this heat . process (. Adapted. . from. . Skračić. ,T., „. Waypoint. ”. Glossary. :. . weather. . conditions. , . high. / . low. . pressure. , . wind. . belts. , . local. . patterns. , . barometer. , . weather. 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). 3. H. 2. O part of constant. Chain Reaction Example. “M” is any other. m. olecule available for collisions. UNITS. Mixing ratio or mole fraction . C. X. . [mol mol. -1. ]. remains constant when air density changes. What is the ultimate energy source for most wind?. Do Now. What is the ultimate energy source for most wind. ?. The Sun. Do Now. Coriolis Effect. Humidity. Isobar. Friction. Key Words. Air Pressure. Barometer. Will air circulate Clockwise or Counterclockwise around each of these pressure centers?. H. L. Cyclonic and anticyclonic winds in the Northern Hemisphere. Cyclones and anticyclones . Cyclone. A center of . Sea and Land Breezes (Thermal Wind). Coriolis Force. Geostrophic Wind. Centrifugal Force & Friction. Gradient Wind. Surface vs Aloft Winds. Mountain Breezes. Katabatic Winds. Force: a quick lesson. The horizontal distribution of air pressure on the globe is studied on the basis of Isobars. If we look at the globe then it appears that there is certain definite system of high and low pressure.. If, for generalization, the globe is considered to be homogeneous (either of land or water), then there should be regular and systematic zonal distribution of high and low pressure but the regularity of pressure belts is distributed due to unequal distribution of land and water on the globe. . Wind is the movement . of air caused by an uneven heating of the Earth’s . surface.. What HEATS EARTH’S SURFACE?. Heat from the sun heats the surface of the Earth.. This heat arrives to Earth in the form of radiation.. air.  or other gases relative to a earth’s surface. . Global winds resulting from the difference in absorption of solar energy between the climatic zones on earth. . Winds . occur on a range of scales, from thunder storms where flows lasting tens of minutes, to local breezes generated by heating of .