Capillary action

Capillary action

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Credit: Martin Shields/SCIENCE PHOTO LIBRARY

Caption: Blue colored water moves up a capillary tube demonstrating capillary action caused by adhesion between the polar water molecules and the glass which is also polar. The demonstration also reveals the effects of cohesion - the attraction between water molecules that causes them to stick together. The blue is from food colouring added to enhance the visual of the water in the tube.

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Keywords: adhesion, capillary action, capillary tube, chemical, chemical property, chemistry, cohesion, demonstrating, demonstration, fingers, holding, hydrogen bonding, hydrogen bonds, person, plastic tube, polar molecules, polarity, principle, properties of water, rising, showing, tube, up a tube, water

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