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The Meteorologist's Tool Box

The Meteorologist's Tool Box
Reading Level
     edHelper's suggested reading level:   high interest, readability grade 7
     Flesch-Kincaid grade level:   8.57

Vocabulary
     challenging words:    nightly, ometer, ometers, weathercast, anemometer, infrared, doppler, thermometer, millibars, heated, mercury, barometer, humidity, measurement, knowing, tech

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The Meteorologist's Tool Box
By Patti Hutchison 		  
1     Thermometer, barometer, anemometer: what are all these "ometers," and what do they tell us? Behind the scenes of your local TV station, meteorologists use many instruments to help give you your weather forecast. These instruments all measure different data about the weather.
 
2     The most common instrument is called a thermometer. A thermometer contains a liquid, like mercury or alcohol, that expands (gets bigger) when it is heated. As the air temperature goes up, so does the liquid in the thermometer. These instruments are marked in units called degrees. In the U.S., we measure temperature on a scale called Fahrenheit. You may have seen temperature measured in Celsius in other countries such as Canada.
 
3     You probably have also heard of a barometer. This instrument measures air pressure. Like a thermometer, it also uses mercury, and is marked in units called millibars. A steady barometer means the weather will stay the way it is for a while longer. If the barometer is rising, you can expect the weather to change to fair. A falling barometer warns of coming precipitation or a possible storm.

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