science challenge presentation by “ the scientists ” by: khushi, maya, ria, aryan
TRANSCRIPT
Science Challenge Presentation
By “ The Scientists”
By: Khushi, Maya, Ria, Aryan
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
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.
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.
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
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
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
Data Collection and ObservationDate Time Wind
Direction Humidity(milibars)
Rain (Cubic Inches)
Tempurature
Barometer Wind Speed
11/17/14 7:00PM E +1 0 490 F 30 in. 0.01
11/18/14 8:00PM E +1 0 540 F 30 in. 0.00
11/19/14 7:30AM No Wind -1 0.10 580 F 30.8 in. 0.00
11/20/14 7:45AM No Wind +1 1.0 550 F 30 in. 0.12
11/21/14 7:00PM E +1 0 630 F 30 in. 0.00
11/22/14 12:30PM E +2 0 450 F 30 in. 0.00
11/23/14 5:30PM SE +1 0 640 F 30 in. 0.00
11/24/14 5:30PM N 0 0 640 F 30 in. 0.00
11/25/14 12:30PM E -1 0 660 F 30 in. 0.17
11/26/14 5:00PM NE 0 0 690 F 30 in. 0.00
11/27/14 2:00PM E -1 0 710 F 30 in. 0.02
11/28/14 10:00AM E -1 0 670 F 30 in. 0.00
11/29/14 3:00PM NE -1 0 660 F 30 in. 0.00
11/30/14 11:00AM NE -2 2.0 570 F 30 in. 0.00
THANK YOU !!!!