Daily Archives: July 31st, 2012

How do gliders fly?

Gliders soar across the sky by riding on air currents. Airplanes without engines are called gliders.  They are very light, with long, slender wings. A glider can glide downhill on air.  It also can soar  upward on rising wind and heat currents in the air. These updrafts are caused by warm air that rises upward …

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