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 !!!!