Why do Planes Leave White Streaks in the Sky?

The video explores the observation of cloud shapes and jet trails in the sky. It explains that jet trails, often mistaken for clouds, are formed from water vapor in jet exhaust. The video demonstrates how vapor from breath becomes visible in cold conditions, similar to jet trails. It discusses how temperature and engine type affect the visibility and duration of jet trails.

What did Squeaks notice about the jet plane flying overhead?

What are clouds mostly made of, and how is this similar to jet trails?

Describe the process that occurs when warm water vapor from your breath meets a cold surface.

Explain how the vapor in jet exhaust becomes visible.

Why might you not see a trail behind a plane?