Weather is always changing.
I'm fond of this project, because it can be done by people living in urban settings. This simple tool is a wonderful way to observe and learn about wind speed.
Anemometer - Measure Wind Speed
Materials:
· 4 small paper cups - like bathroom cups
· 4 plastic drinking straws
· tape
· scissors
· straight pin or small nail
· pencil with a new eraser
· stapler
· notebook
· (optional) webcam, camcorder
Procedure:
1. Make a cross from the straws and tape them at the center
2. Staple the top side of one cup to each straw
3. Make sure the cups all face the same direction
4. Push the pin through the straw intersection into the pencil eraser
5. The pencil is your axis
6. Mark one cup, so you have a measuring point
7. Test by blowing or using a fan to ensure this spins
8. Mount your anemometer in a place where it has access to wind from all directions.
http://ezinearticles.com/?How-to-Build-an-Anemometer-to-Measure-Wind-Speed&id=413654
