What does turbulence refer to during a flight?

Turbulence during a flight refers specifically to bumpy air conditions that result from irregularities in the airflow. This phenomenon can be caused by various factors such as atmospheric pressure changes, jet streams, mountain waves, and weather front interactions. When an aircraft encounters these turbulent air currents, it can result in sudden jolts or changes in altitude, making the flight feel bumpy or shaky.

Understanding turbulence is essential for flight attendants as it can affect passenger comfort and safety. During periods of turbulence, it’s crucial for flight attendants to ensure that passengers are seated with their seatbelts fastened and to maintain order in the cabin.

The other options do not accurately define turbulence: a smooth part of the flight refers to a steady and comfortable flying experience, unpredictable weather conditions pertain to broader weather phenomena which may or may not cause turbulence, and air traffic delays involve complications in the flight schedule unrelated to the actual experience of turbulence in the air.