Our Activities

Make your own Anemometer

Stick the protractor to the cardboard with sellotape, with the straight side at the top
Write the following wind conversion chart onto the cardboard as well:

string angle	90	80	70	60	50	40	30	20
wind speed (km/hour)	0	13	19	24	29	34	41	52

Attach the thread to the ping pong ball
Tie or glue the other end of the thread to the centre of the protractor
Hold the cardboard in the direction that the wind is blowing, allowing the ball to be caught by the wind.
Convert the angle the thread makes to a wind speed using the conversion chart
If you have one, compare your readings to those made with a 'real' anemometer - how does it compare? Otherwise, compare your readings with the Beaufort Scale
To see a picture of what your anemometer should look like, click here

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