Have you ever looked up at the sky and wondered what those white lines behind airplanes are? Those are called contrails, short for "condensation trails," and they are formed when the hot exhaust from an airplane's engines mixes with the cold air in the atmosphere. In this video, we will explain what contrails are, how they are formed, and why they sometimes persist for hours, spreading out to form thin clouds.
Hashtags: #contrail #airplanetrail #whitesmoketrail #skyline #atmosphere #scienceexplained
