1. Harvest the Wind Presented by: Connie Tebow Lesson: Courtesy of Ag in the Classroom

2. Agenda What is wind? AITC’s “Harvest the Wind” lesson. The Good, The Bad, and The Ugly Few facts on windmills Few facts on the wind farms/OSU wind farm Ag in the Classroom Make your own working pinwheel

3. What is Wind? Wind is air in motion caused by the uneven heating of the earth’s surface by the sun. Earth has many different surfaces that absorb the sun’s radiation differently. The hot air over land expands and rises and the heavier, cooler air from over the water rushes in to take its place. At night this process is reversed.

4. When the wind blows… The Good… The Bad… The Ugly…

5. Windmills Used to pump water, drain land, grind grain, and mill timber. Uses renewable energy. Converts kinetic energy to mechanical energy. Idea created as early as 600 A.D. American farmers began using windmills during the 1800’s.

6. Wind Turbine The first turbine to generate electricity was built in 1888. It was 60 feet tall and had 144 cedar rotor blades.

7. Today’s Wind Farms Uses the wind’s energy to generate electricity At full power they produce 2.3 Megawatts, which is enough to power 600 homes on average. Landowners receive sealed bid which is different for each owner. Many factors play a part in amount paid. Two-year study of land area before placement of turbines.

8. OSU’s Cowboy Wind Farm near Blackwell, Oklahoma… 26-turbine wind farm, completed in Dec. 2012 59.8 megawatts will produce enough power for 17,500 homes 67% of OSU’s electricity is from wind generation. Natural gas supplies the rest. Turbines are 80 meters to center of hub, which is 263 feet. There are wind speed and wind direction sensors at top of the turbine. Startup is about 3 meters per second, which is 6-7 mph. They produce full power at 9 m/s, which are 18-19 mph winds. Creates 5 permanent jobs

13. Ag in the Classroom A website full of lessons for all grades, complete with standards. Contests Grants Smart board activities Crafts, games, songs Teacher training (professional development)

14. 2013 Summer Tour

15. www.agclassroom.org/ok