Why Do Water Droplets Form on a Cold Glass? The Chilling Science of Condensation Explained.
© ViScienceBlogs 2025. All rights reserved. Why does your cold drink make the outside of the glass wet? Discover the science behind condensation, dew point, and how temperature changes turn invisible air moisture into visible droplets. A simple explanation packed with relatable examples. The Everyday Mystery Everyone Notices But Few Understand You grab a chilled glass of water from the fridge. Within minutes, the glass seems to "sweat." Tiny droplets bead up and drip down the sides even though there’s no leak, no splash, and no trickery. So what’s happening? Where did that water come from? Answer: The moisture was in the air all along invisible, floating, waiting… And your icy glass just revealed it. When we fill a container with ice-cold water, after a while, water droplets will start appearing on the outside surface of the container. The energy of the water vapor (moisture) present in the air decreases due to coming into contact with cold water and it turns into a liqui...