capillary - University of Florida Chemistry Outreach...

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University of Florida Chemistry Outreach Program Capillary Action in Plants Estimated time: 50 mins. + 10 mins. clean-up Topics: Capillary action, Properties of water, Logging qualitative observations, SC.G.1.3 Introduction: Capillary action is important for moving water (and all things dissolved in it) around. It is defined as the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension. Capillary action occurs because water is sticky -- water molecules stick to each other and to other substances, such as glass, cloth, organic tissues, and soil. Dip a paper towel into a glass of water and the water will "climb" onto the paper towel. In fact, it will keep going up the towel until the pull of gravity is too much for it to overcome. Plants use capillary action to absorb water and nutrients from the ground and pull it up their stalks. They can then distribute this water throughout the plant. Objective: This lab is designed to teach the concept of capillary action. Capillary action occurs when the water molecules are more attract to the surface than to themselves. In the experiment, the students will get
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This note was uploaded on 09/18/2011 for the course CHM 3218 taught by Professor Stewart during the Spring '08 term at University of Florida.

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capillary - University of Florida Chemistry Outreach...

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