BIOL 110 Lecture Notes - Lecture 4: Emergence, Surface Tension, Plant Cell
Document Summary
The polarity of water molecules results in hydrogen bonding. Polarity allows water molecules to form hydrogen bonds with each other. The water molecule is a polar molecule: the opposite ends have opposite charges. Four emergent properties of water contribute to earth"s fitness for life. Four of water"s properties that facilitate an environment for life are: Collectively, hydrogen bonds hold water molecules together, a phenomenon called cohesion. 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. Water absorbs heat from warmer air and releases stored heat to cooler air. The specific heat- the amount of heat that must be absorbed or lost for. 1g of that substance to change its temperature by 1-degree c. Water"s high specific heat can be traced to hydrogen bonding: As a liquid evaporates, its remaining surface cools, a process called.