This document provides instructions for making a simple anemometer to measure wind speed. It lists the materials needed as 3 transparent plastic cups, 1 colored cup, balsa strips, glue, a screw, and a post with a hole. The cups are glued to the ends of two balsa strips which are then glued and screwed together, and the device is attached to the post using the screw to measure how fast the cups spin and thus determine wind speed.

1. Wind speed
Escola Dolors Almeda
(Cornellà de Llobregat)

2. What do you think
it measures?
.

3. This is an
anemometer.
It measures
wind speed.

4. What will How can
we need to we make
it?
make one?

5. Glue

6. Plastic cups: - 3 transparent cups
- 1 coloured cup

7. A post with a hole for the screw.
screw

8. 2 balsa strips

9. Glue a plastic cup at the two ends
of each of the balsa strips .

10. Glue the two balsa strips together.

11. Join them using the screw.

12. Try the anemometer!
REMEMBER: Use a watch!!