turbulence

Turbulence is like when the air gets bumpy and it shakes and wobbles around like a bumpy boat. It's common when an airplane is flying through cloudy weather, and it can make the plane go up and down suddenly, like a roller coaster. Sometimes you might feel your stomach going up and down with the plane, which is the turbulence. It's usually not dangerous or scary, but it can make the plane ride a bit bumpy.