AP Environmental science powerpoint
Chapter 3 Notes Water and the Fitness of the Environment Concept 3.1 Water is a polar molecule, opposite ends have opposite charges. A slightly positive hydrogen is attracted to a slightly negative oxygen of a nearby molecule. The two molecules are held together by a hydrogen bond Concept 3.1 Hydrogen bond ? ? H ? + H O ?? ?? ? + ? + ? + ? ? ? ? ? ? Concept 3.2 Water will stick to each other with hydrogen bonds (1/20th as strong as covalent bonds). Results of Hydrogen bonds 1) Cohesion: when a substance (water) is held together by hydrogen bonds 2) Adhesion: the clinging of one substance to another Concept 3.2 Water-conducting cells Adhesion Cohesion 150 ?m Direction of water movement Concept 3.2