SCIENCE PHOTO LIBRARY MOTION SCIENCE PHOTO LIBRARY MOTION
Meniscus and volume measurements. Footage of a piece of coloured card being placed behind a burette with graduated volume markings, showing the meniscus formed by the liquid. The volume reading is taken from the centre of the meniscus. The meniscus is the curving of the water at the surface due to its surface tension, the difference between the attraction of the molecules in the liquid to each other compared to their attraction to the glass walls of the container.
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