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November 10, 2011

November 10, 2011. 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. How to determine Dew Point & Humidity. Use a sling psychrometer:

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November 10, 2011

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  1. November 10, 2011

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

  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 Wind moves from ________________ to ________________ L H WIND Low Pressure High Pressure 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. Think of contour maps made of hills of air... http://ww2010.atmos.uiuc.edu/(Gh)/wx/surface.rxml

  10. There is always a more complex map

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

  12. The Rules of Wind 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.

  13. 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

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

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