What are unpredictable changes in the air referd to as?

Unpredictable changes in the air are commonly referred to as "turbulence." This phenomenon can occur in various forms, including atmospheric turbulence caused by wind shear, thermal currents, or obstacles like mountains. Turbulence is often experienced during flights and can lead to sudden, erratic movements of an aircraft. It is a natural part of atmospheric behavior and can be challenging to predict.