Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Chapter 8 Section 3-5 (section 1-2 info is in your Water Cycle Presentation) Section 3 Air Masses- a huge body of air that has similar temperature, humidity, and air pressure at a given height. Types of air masses: • Maritime Tropical • Maritime Polar • Continental Tropical • Continental Polar Maritime-over the ocean, humid Continental-over land, low humidity Tropical-warm Polar-cold How air masses move• Prevailing Westerlies- • • major wind belt over US, usually west to east. Jet Streams- high speed air masses embedded in the westerlies. Fronts- the boundary where two air masses meet. Types of Fronts • Cold fronts- cool, dense air • Warm fronts- warm, less dense air • Stationary frontswhen cold and warm air meet, neither one can move • Occluded fronts- where a warm air mass is caught between two cold air masses Section 4 Storms! • A violent disturbance in the atmosphere. • Thunderstorms with heavy precipitation, including • • • • thunder, the sound of an explosion, and lightning, an electrical charge. Tornadoes- a rapidly whirling, funnel-shaped cloud over land that reaches down from a storm cloud to the earth. Snow storms- large amounts of precipitation in the form of snow. Hurricanes-tropical cyclone, which is a swirling center of low air pressure, winds of 119 kph at least, begins over water, the “eye” of a hurricane is the calm inside the middle. Floods- after a major downpour of rain, flash floods can occur. Section 5 Predicting Weather Meteorologist- scientists who study the causes of weather and try to predict it. They use maps, charts and computers to forecast the weather. Reading a weather map: Symbols, color for temperature and lines are used to show the direction of winds, fronts, etc.