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Ответ:
A miracle of nature is a singing dune. It is located near Almaty.
The sand makes the most unexpected sounds. You may hear a dog barking, the ringing of a stretched string. If you climb to the top of a dune on a windless day and run down its slope, you can hear a loud sound resembling the rumble of a flying plane.
The dune makes bizarre sounds because the distance between the grains of sand changes when it crumbles. In the intervals between the grains of sand, air enters and exits them, creating amazing sound vibrations of the air.
Why don't other dunes sing? It turns out that in order for the sands to "sing", special conditions are needed. Firstly, all grains of sand should be round, with a diameter of 0.1 to 0.5 mm.. Secondly, they must have silica in their composition. And finally, a certain humidity.
Объяснение:
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