A Complete Collection of 100000 Whys
Fav十万个为什么
为什么蒲公英的种子能飞？
蒲公英种子能飞主要得益于冠毛的“降落伞”效应、涡流环的形成以及空气阻力的作用。
1、冠毛的“降落伞”效应：蒲公英种子表面的冠毛结构，像一个小绒球，能够延缓种子的降落速度，使种子在空气中悬浮更长时间，从而借助风力扩散。
2、涡流环的形成：空气在冠毛间隙中流动时，会在种子上方形成一个稳定的涡流环，这种涡流环为种子提供了额外的升力，帮助其保持飞行状态。
3、空气阻力的作用：冠毛增大了种子与空气的接触面积，增强了空气阻力，进一步减缓了种子的下降速度，使其能够随风飘散到更远的地方。
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