This activity complements How to Make an Anemometer and How to Deal With High Winds for a more in-depth study of wind speed using the Beaufort scale.
Sir Francis Beaufort developed this method of determining wind speed in the 19th Century and it is still used today.
What we call moving air depends upon how fast the air is moving, according to this chart:
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0 mph ( 0 |
Calm |
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1- 3 mph ( 1- 5 |
Light air |
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4 - 7 |
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8-12 |
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13-18 |
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19-24 |
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25-31 |
Strong breeze |
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64-72 |
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73+ mph (122+ |
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