1. Science Challenge Presentation By “ The Scientists ” By: Khushi, Maya, Ria, Aryan

2. Weather Vane How It Works ●Free rotating stick with an arrow which turns according to the wind direction ●The tail is pushed by the wind ●The head points toward the direction of the wind ●To get an accurate reading, you have to make sure that the weather vane is in motion ●Measures which direction the wind is coming from

3. Hygrometer ●Measures humidity (amount of moisture in the air) ●The unit of measure for vapor pressure is called millibars How It Works ●Moisture collects in hair causing it to expand ●Expansion moves pointer down ●Negative numbers on the scale shows that there is more moisture in the air Relationship ●We found that when there is humidity, chances of rain is high.

4. Rain Gauge ●Measure amount of rainfall in cubic inches How It Works ●made a scale based on 3 ¼ tsp = 1 cu. in. ●Put bottle on a flat surface with no obstructions ●Wait for rain and empty after every rain event Relationship ●We found that when there is more rain, the humidity is higher.

5. Thermometer ●Measures temperature in degrees fahrenheit ●On my scale one centimeter is equal to eight degrees fahrenheit How It Works ●When the temperature goes up, rubbing alcohol expands and moves up the water in the straw ●Every 8 degrees it goes up one centimeter Relationship ●We found that temperature goes up when its hot

6. Anemometer ●Measures wind speed in miles per hour How It Works ●when the wind blows the anemometer spins ●faster the wind blows, the more revolutions the anemometer makes ●rpm * diameter * 0.003 = wind speed

7. Barometer ●Measures atmospheric pressure in inches ●Atmospheric pressure is force exerted on a surface by the weight of the air How It Works ●When atmospheric pressure increases, air presses against the surface and liquid is pushed up the straw ●When atmospheric pressure decreases the liquid in the straw goes down Relationship ●Usually, decreasing atmospheric pressure indicates that rain is coming

8. Data Collection and Observation DateTimeWind Direction Humidity (milibars) Rain (Cubic Inches) Tempur ature BarometerWind Speed 11/17/147:00PME+1049 0 F30 in.0.01 11/18/148:00PME+1054 0 F30 in.0.00 11/19/147:30AMNo Wind0.1058 0 F30.8 in.0.00 11/20/147:45AMNo Wind+11.055 0 F30 in.0.12 11/21/147:00PME+1063 0 F30 in.0.00 11/22/1412:30PME+2045 0 F30 in.0.00 11/23/145:30PMSE+1064 0 F30 in.0.00 11/24/145:30PMN0064 0 F30 in.0.00 11/25/1412:30PME066 0 F30 in.0.17 11/26/145:00PMNE0069 0 F30 in.0.00 11/27/142:00PME071 0 F30 in.0.02 11/28/1410:00AME067 0 F30 in.0.00 11/29/143:00PMNE066 0 F30 in.0.00 11/30/1411:00AMNE-22.057 0 F30 in.0.00

9. THANK YOU !!!!