BIOL 111 Chapter Notes - Chapter 3: Celsius, Kinetic Energy, Hydrogen Bond
23 Dec 2019
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Document Summary
Concept 3. 1: polar covalent bonds in water molecules result in hydrogen bonding. The water molecule is a polar molecule: the opposite ends have opposite charges. Polarity allows water molecules to form hydrogen bonds with each other. Concept 3. 2: four emergent properties of water contributes to the suitability for life. Versatility as a solvent (water is nature"s best solvent) Collectively, hydrogen bonds hold water molecules together, a phenomenon called cohesion. Plants pull water up from the ground (goes against gravity: without cohesion plants would not be able to pull the water up. Cohesion helps the transport of water against gravity in plants. Adhesion is an attraction between different substances, for example, between water and plant cell walls. Surface tension is a measure of how hard it is to break the surface of a liquid. Spiders are so light they don"t break the hydrogen bond on the surface of the water.
