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, hydrogen bonding, hydrogen bonds, plastic tube, polar molecules, polarity, principle, properties of water, rising, showing, tube, up a tube, water

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