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Capture the Wind
Capture the Wind
Is it windy where you are today? Fantastic! That is the perfect time to investigate the atmosphere and engineer a common meteorological tool called an anemometer. Like a thermometer measures temperature, an anemometer measures the speed of the wind. Wind speed impacts how we feel temperature, weather patterns, and so much more! But how do they work?!
Anemometers have cups connected to arms that revolve/spin on a center axel or rod. This is connected to a generator, or motor, that calculates the speed of the wind based on how fast the cups are spinning. Meteorologists can use this measurement to determine how fast the wind is consistently blowing and also calculate wind gusts.
Another way to measure the wind is a windsock. These are commonly seen on long bridges, at airports, or by helipads (where helicopters land). Each strip indicates a different speed of wind which is measured in Knots. A windsock helps people make decisions about driving or piloting their craft. In example, a driver of a large tractor trailer may not want to cross a long bridge with a strong cross wind because it could tip over the vehicle. Even though they are not as precise as an anemometer, what do you think are some advantages of a windsock?
Check out Science Buddies for a fabulous tutorial on how to build an anemometer at home. It is made from supplies you probably have at home: small paper cups, straws, a pencil, push pin, and a hole punch.
https://www.sciencebuddies.org/teacher-resources/lesson-plans/make-anemometer-measure-wind-speed
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