weather instruments by amanda, virginia, and caroline
TRANSCRIPT
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Weather Instruments
By Amanda, Virginia, and Caroline
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Beep, Beep… I’m sensing Radar!
• Radar was originally designed for World War ll to detect Nazi airplanes.
• Radar works by sending out regular waves at high frequencies.
• The signal travels 350,000 kilometers a second.• Doppler Radar is an improvement from the old
radar machines.• Most radar machines send out 1,000 signals a
second.• Doppler radar can now detect weather such as
tornadoes, rain, wind, and sometimes even birds, bugs, and dust.
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Windsocks, not for warming your feet
• A windsock tells the direction in which the wind is going.
• Windsocks are normally used at airports or places where planes or helicopters are landing, such as hospitals.
• Wind speed can be indicated by a windsock angle.
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Mom explains to boy, weather balloons aren’t for parties.
• Weather balloons carry instrument packages into the atmosphere.
• Important data needed to forecast the weather is gathered by weather balloons.
• Weather balloons are launched twice a day at over 1000 sites around the world.
• They can measure temperature, humidity, and air pressure.
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Breaking news! Wind Vanes don’t carry blood.
• Measuring wind has always been difficult to do.
• Buildings always get in the way of getting the correct wind speed.
• Wind directions are reported as the direction the wind is coming from.
• Wind vanes measure the direction that the wind is going.
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Barometer won’t be found at the doctors.
• The barometer was invented in 1643.
• It was invented by the Italian scientist Evangelista Torricelli.
• He used a 34 foot tube that had a column of water inside it.
• The water was soon replaced by mercury.
• It measures the air pressure.
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Weather maps don’t show how to get to Grandma’s
• Weather maps are national radar images.
• They have a surface map displaying the locations of high and low pressure.
• There are often legends or map keys on the map explaining the symbols.
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Satellites, they don’t always provide Charter
• Satellites are more accurate now than they used to be.
• With them we can see the big picture all at once.
• Meteorologists can track weather systems with satellites.
• Not only can they tell us where clouds are, but they can measure the temperature of water, clouds, and the ground.
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Thermometers good for weather and fevers.
• A thermometer measures the average kinetic energy of the air molecules around it.
• When the molecules hit the thermometer the kinetic energy is transferred from the molecules to the glass to the Mercury inside the thermometer.
• When the mercury molecules start to move faster, they push the mercury up in the thermometer.
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A Rain Gauge won’t be found in a car.
• Rain gauges used today by officials were invented over 100 years ago.
• Special measuring sticks are often put in the measuring tube to account the vertical scale exaggeration.
• Standard rain gauges can measure up to 2 inches of rain.
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Anemometers Can’t Take Your Temperature.
• An anemometer is a tool that tell how fast wind is blowing.
• It can’t give an exact wind speed.
• Professional ones can accurately measure how fast the wind is blowing.
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Conclusion
• Weather instruments include windsocks, weather balloons, wind vanes, barometers, satellites, and anemometers. Meteorologists use these tools to gather data and predict the weather.
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Bibliography
• http://www.wildwildweather.com/radar.htm
• http://www.wildwildweather.com/satellit.htm
• http://www.energyquest.ca.gov/projects/anemometer.html
• http://www.infoplease.com/ce6/sci/A0806263.html#axzz0zWOjVoxA
• http://www.usatoday.com/weather/wanemom.htm
• http://science.howstuffworks.com/physical-science-channel.htm
• http://web.up.ac.za/default.asp?ipkCategoryID=2049community/vane.htm
• http://www.usatoday.com/weather/wrngauge.htm