ATMOSPHERIC COMPOSITION - WEATHER
This first lesson on weather introduces the student to the atmosphere. They learn about its compositional make-up, the features of its four layers, including the manner in which the temperature, within each level, varies with altitude. This video stresses the importance of uneven solar heating as a critical force, which drives the planet’s great “weather machine”. Students will see first hand, by demonstration, what causes this unequal heating distribution. Among the factors: variations in the specific heats of water and soil, the rotation and the tilt of the earth, etc. While this lesson establishes a good basic foundation for further studies in meteorology, it contains much stand alone information within the discipline of physical science as well. [color, 20 minutes, Grades 9-12] $39.95 TT0060
PRESSURE AND WINDS - WEATHER
The weather is influenced by a multitude of factors and this video looks at one of the most important, atmospheric pressure. Students will gain an understanding of what causes air pressure, how it is measured, the units used, how pressure readings are displayed on a map, how air pressure is affected by temperature and atmospheric moisture content, what a changing barometric pressure may mean in a forecast, what causes low and high pressure areas to form and much more. [color, 20 minutes, Grades 9-12] $39.95 TT0061
HUMIDITY AND FRONTS-WEATHER
What roles do water vapor and the movement of air masses play in producing weather? To answer that question, this video lesson first teaches students the meaning and importance of terms like relative humidity, dew point, condensation, and evaporation. They learn how to recognize cloud types. What causes frost and what conditions produce rain or snow? Then, they are introduced to the differences in weather fronts and air masses and the types of weather each is likely to bring. [color, 20 minutes, Grades 9-12] $39.95 TT0062
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