2. Objective: Determine Relative Humidity and dew point at various places around Riverheads HS Agenda: Go over Relative Humidity/dew point worksheet Go over Test Lab: Relative Humidity Wind Notes

3. How to determine Dew Point & Humidity Use a sling psychrometer: 1. Find the "dry bulb temp" 2. Subtract the dry and wet bulb. 3. Find the difference on the top Use the exact same procedure for finding the Relative Humidity CHECK YOUR CHART!!

4. Moving air is called Wind 231mph @ Mt. Washington, NH April 12, 1934 http://www.mountwashington.org/about/visitor/recordwind.php World's Strongest Wind:

5. Wind Basic Rules: 1. Warm air rises 2. There is always air 3. Warm air cools off 4. The Sun heats the GROUND Wind is caused by differences in air pressure

6. Wind Low Pressure L High Pressure H WIND Wind moves from ________________ to ________________ Remember that...

7. Wind Which way is it moving??

8. Wind How about here? ?

9. Isomaps & Wind Isobars: connect points of equal pressure The closer the lines the higher the wind speed. http://ww2010.atmos.uiuc.edu/(Gh)/wx/surface.rxml Think of contour maps made of hills of air...

10. There is always a more complex map

11. Global Winds Same thing; sideways and double Warm air rises Air moves in Air cools off and sinks

12. wind is measured by an anemometer (wind speed) and a wind vane (direction) Wind moves from areas of high pressure to areas of low pressure Coriolis Effect: Because the earth is rotating, wind appears to curve. In the northern hemisphere it curves to the right. The Rules of Wind

14. Coriolis Effect Because the Earth is rotating, the movement of objects appears to curve. In the NORTH the curve is to the right. coriolis.mov

15. Weather Instruments Wind Vanes wind direction Thermometers Temperature Barometers Air Pressure Anemometers Wind Speed Leaning Tower of Pisa Mt. Washington -