Category Archives: Hilly Land

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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