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What is this object? Anemometer, instrument used to measure the wind What purpose of an Anemometer? Measure the wind speed How does it work? Multiply the circumference by the revolutions Today you are going to make one!

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Open Calculating Wind Speed You will collect data during class and calculate your wind speed as homework

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Open Atmospheric Movement and Fronts Lab

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Stay in control!!!!!!!!

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Why is burning the paper necessary? The burning paper heats the air and removes the oxygen. The paper will burn until the oxygen is used or the paper in consumed. The air then warms then cools as the fire go out. Because there is less air in the jar now, it exerts less pressure. When the temperature inside and outside of the bottle is the same, the air pressure outside the bottle pushes the balloon inside. How does this demonstration relate to atmospheric patterns and weather? If the temperature of the air changed, the pressure of the sir also changes. Heating a constant volume of air causes the pressure of the air to increase. If the air is cooled, the pressure decreases. This pattern is seen in high and low pressure areas, convection, and air masses.

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Copy what is in Yellow

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0 o Equator 30 o S 60 o S 90 o S 30 o N 60 o N90 o N More Direct Sun Hot

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Forms high in the upper Troposphere between two air masses of different temperatures Higher temperature difference = faster speed Due to the Coriolis Effect, it flows around air masses. Polar Jet: It dips southward when frigid polar air masses move south. It tends to stay north in the summer months

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http://www.pbs.org/wgbh/nova/vanish ed/jetstr_five.html

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Abnormally high surface ocean temperatures off the coast of South America Causes unusual weather patterns across the globe

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A strong surface current Begins at the tip of Florida Flows up the eastern coastline of the U.S. Crosses the Atlantic Ocean Causes warmer climate in NW Europe

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When convection and winds cause air masses to move, they bump into one another. The area where two air masses meet is called a front. Most severe weather occurs near frontal boundaries.

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Draw this

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Stationary Front: Warm and cool air masses that are not strong enough to move one another Sits still for a long period of time

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Draw This

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http://www.phschool.com/atschool/ phsciexp/active_art/weather_fronts/

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Air pressure is measured with a barometer in millibars. Millibars are represented by connected lines of equal pressure. This is a lot like the topographic map lines. The closer together the lines are, the faster the wind speed. The farther apart the lines are, the slower the wind speed.

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The Sun heats the water and land every day. Land heats up rapidly, but cools off rapidly. Desert Water heats up slowly, but cools off slowly. Swimming at night The heat retained by the oceans is what keeps our planet insulated.

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The heating and cooling of water and land produces land breezes and sea breezes. High pressure moves toward low pressure, pushing the warm air upward. As warm air rises, cooler air moves in and replaces it.

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http://www.classzone.com/book s/earth_science/terc/content/vis ualizations/es1903/es1903page0 1.cfm?chapter_no=visualization

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Using the notes we just took answer theses questions in one complete sentence, at the bottom of your page Why does the Earth have wind and ocean currents? How do global patterns of atmospheric movement affect local weather?

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Follow Directions Complete Handout and Turn In

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With your shoulder partner, sort the cards into 6 groups of 3

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Weather maps are used to show current weather conditions in an effort to predict future weather conditions. You need to know what each symbol means and how to interpret them to forecast the weather.

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Cold, dense air is moving toward warm, less dense air. The warm air is pushed up to cool and form clouds as the cooler air replaces it. The air on the front side of the boundary line is warmer than the air on the back side of the boundary line. Cold Fronts are usually fast moving and bring stormy weather and heavy precipitation followed by clearing skies and higher pressure.

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Warm air is moving toward cold air. The warm, less dense air slides over the cold, more dense air. The air on the front side of the boundary line is cooler than the air on the back side of the boundary line. Warm Fronts usually move slowly and bring steady rain or snow over many days.

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These fronts occur when neither the cool or warm air masses are strong enough to replace each other. Stationary Front tend to stay in an area for a long period of time, often bringing precipitation and clouds.

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Cooler, dense air close to the surface of the Earth. Surrounded by winds flowing in a clockwise direction. High pressure Usually brings dry conditions and fair skies.

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Lets practice. Remove the lid from the bottle. Now, replace the lid. What direction did you turn the lid to tighten it? Did the lid move up or down? This is a way to remember high pressure.

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Warmer, less dense air above the Earths surface Surrounded by winds moving in a counterclockwise direction. Low pressure Associated with the formation of storms.

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Lets practice. Remove the lid from the bottle. What direction did you turn the lid to loosen it? Did the lid move up or down? This is a way to remember low pressure.

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With your shoulder partner complete the handout using the laminated maps Switch

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Follow the directions Work with your group Due at the end of class Group Jobs 1. Researcher 2. Tracer 3. Key Person 4. Director

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Study your spiral Write Test on your warm up log After the Test STAY QUEIT You may read, work on homework, or get on the computer If we have time I will check your grades after the test