A windsock is a large, conical, open-ended tube designed to indicate wind direction and relative wind speed. Windsocks typically are used at airports and in chemical plants in which there is risk of gaseous leakage. They are sometimes located alongside highways at windy locations.
Wind direction is indicated by the direction in which the windsock is pointing (note that wind directions are conventionally specified as being the compass point from which the wind originates; so a windsock pointing due north indicates a southerly wind.) Windspeed is indicated by the windsock's angle relative to the mounting pole; in low winds, the windsock droops; in high winds it flies horizontal.
Wind is directed down the tube, causing the narrow end to point in the same direction the wind is blowing.
The windsock aligns itself with the wind and the strips move toward a horizontal position.
Place a windsock in the classroom in different positions and ask the students to determine if there is air circulation in the room, and from which direction.
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