Do now Discussion: How do you think the wind blows? Why doesn’t air just stay still? Teaching Point: “To analyze global air patterns.”

Hotter places = lower density air = lower air pressure Colder places = higher density air = higher air pressure Air always moves from high pressure to low pressure; this is called the Wind TP: “To make connections between air pressure, wind, and the seashore.” Let’s Review Why Wind Blows

Lower air pressure = warmer air rising  Less dense air rises above more dense air Higher air pressure = cooler air sinking  More dense air sinks below less dense air Let’s Review Rising and Falling Air TP: “To make connections between air pressure, wind, and the seashore.”

Convection Cells and Wind TP: “To make connections between air pressure, wind, and the seashore.”

Global Wind Convection Cells Air that travel around the globe in very, very large convection cells located in the troposphere are Global Wind Cells: 1. Tropical Easterlies (i.e. the trade winds) 2. Westerlies 3. Polar Easterlies Tropical Easterlies Polar Easterlies Westerlies TP: “To analyze global air patterns.”

Very Fast Moving Air High Up Between global wind belts are areas of very fast moving wind located high in the sky, or a Jet Stream Tropical Easterlies Westerlies Polar Easterlies TP: “To analyze global air patterns.”

Jet Stream Across the Atlantic TP: “To analyze global air patterns.”

Jet Streams Separates Air Temps The Jet Stream separate cold air in the North from warm air in the South TP: “To analyze global air patterns.”

Observing Earth’s Jet Stream TP: “To analyze global air patterns.”

Take out your Plicker cards or SMART clickers and sign into the teacher’s class. Wait for the assessment to begin As soon as the assessment starts, you have one (1) minute to answer the multiple choice question. Mid Lesson Assessment TP: “To analyze global air patterns.”

1.Hot air is less dense than cold air. True of False 2. Air travels from areas of ________ pressure to areas of ________ pressure. a. high, low b. low, high c. low, low d. high, high Mid Lesson Assessment TP: “To analyze global air patterns.”

If air always flows from areas of high pressure to areas of low pressure, how might this connect to your breathing? Intellectual Engagement TP: “To analyze global air patterns.”

Class Activity- Modeling Instructions: Create a detailed model of the movement of air moving from high pressure to low pressure… Task A- along the surface of the Earth. Specifically show how the air temperature and air pressure differences cause wind. Task B- over a very large area, like across the United States, and show how areas of high pressure and low pressure cause wind Task C- around the globe, showing how the jet stream separates warm, low dense air near the equator from cool, high pressure air near the poles Flexible Group- take out your portfolio and meet me in the back of the room at my desk. TP: “To analyze global air patterns.”

Lesson Summary In your tables of four, go back into your notes and consider what we have just learned today, and then… 1. Identify three (3) important concepts we learned today 2. Place those the three in order from the most important concept to least important. TP: “To analyze global air patterns.”