Wind speed and altitude
The materials required for this science project:
- 4 anemometers
- 1 metal rod (measuring 5m in length)
- 1 stopwatch
1. For this science project, the independent variable is the height at which the anemometer is placed. The dependent variable is the rotating speed of the anemometer. This is determined by counting the number of turns made by the anemometer in one minute. The constants (control variables) are the chosen location for the testing, the wind speed, the distance between the anemometers, and the performance of the anemometer.
2. Assemble the 4 anemometers 1m apart on the metal rod. Leave 500mm at the base of the rod to plant it into the ground.
3. Choose a site on top of a hill to perform the experiment. The location is preferably an open field hill or a hill with minimal obstruction to the flow of wind. Obstructions include trees and nearby buildings.
4. Plant the metal rod with the anemometers into the ground at the chosen location with varying heights of 1m, 2m, 3m and 4m.. Assign an assistants to observe each anemometer. Once the wind blows and the anemometer starts to turn, start the stopwatch, count the number of turns made by the anemometer in one minute and record the values in a table, as shown below.
5. Carry out the tests for 3 days, and record the results in a table, as shown below.