Today, weather balloons do most of the work for us, letting the experts stay safely on the ground. In the United States alone, weather balloons are launched twice a day from 92 weather stations. This works out to a total of 67,160 balloons per year. Worldwide, more than 900 weather st...
For example, they can be used in scientific research, like studying weather patterns and testing new materials. And in the medical field, they're even used to deliver medicine and perform surgery. Did you know that balloons can even be used to clean up oil spills? Sc...
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More than 70 years after scientists sent up the first experimental weather balloon, they remain the workhorses of modern meteorological forecasts. Whether it's a tornado warning or the weather report on the 6 o'clock news, weather balloons are what keep people on the ground tuned in to the ...
Significant pressure changes caused by the weather (e.g., a low-pressure system moving into the area) Only if the skydiver is in free fall at 750 feet will the CYPRES unit cut the reserve loop. The skydiver turns on the CYPRES on the ground. The CYPRES computer takes a measurement of...
How Hot Air Balloons Work How does a speedometer in an airplane work? More Great Links United States Hang Gliding Association (USHGA) Hang Gliding and Hang Gliders: So You Want To Really Fly? USHGA: Hang Gliding Frequently Asked Questions Kitty Hawk Kites Share: More Awesome Stuff Up ...
As early as 400 B.C., innovators in China used specially designed kites to test weather conditions [source: NASA]. More than 2,000 years later, the Montgolfier brothers flew the first hot air balloon, carrying a (presumably surprised) rooster, duck and sheep to an altitude of 6,000 feet...
Clouds move across the sky, and it's all thanks to the wind. These clouds bring in rain for thirsty trees and flowers. There are weathercocks like this one on top of some buildings A weathercock gives us the answer to this question, "Where is the wind blowing from?
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T:What color are they ?Ss: They are … . T: Look!How many ducks do you see ?Ss: I see ….(板书) G1/G2 :How many balloons do you see? G3/G4: I see … . G3/G4: How many birdsdo you see?G1/G2: I see … . ...