BIOL 1020 Lecture Notes - Lecture 3: Weak Base, Beta-Carotene, Organic Compound
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BIOL 1020 Full Course Notes
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Key point: because of the difference between the electronegativity of oxygen and hydrogen in water causes hydrogen bonds. Hydrogen bond leads to surface tension and cohesion- the attraction of one water molecule to another, cohesion. Wetting capacity- ducks oiling their feathers if that is removed the water is then attracted to the charged proteins on the ducks feathers and water adheres to them causing them to sink. Definition: capillary action is the movement of water up through very small channels or tubes, the narrower the tube the higher it will cause the water to move. Capillary action is adhesion and cohesion working together. The surface of the glass is charged so the water molecules are attracted to the class, adhesion, they then pull the rest of the water molecules up because they are attracted to each other, cohesion. This is how water can move through soils and to the root zone where it can be taken up by plants.
