AP Biology Campbell/Reece 8e Chapter 3 Notes
Subject:
Biology [1]
Tags:
AP Biology [14]
Chapter 3 – Water and the Fitness of the Environment
3.1 – The polarity of water molecules results in hydrogen bonding
• Polar molecule – two ends of the molecule have opposite charges
• Oxygen: δ-
• Hydrogen: δ+
• Positive hydrogen of one molecule is attracted to negative oxygen of another in a hydrogen bond
3.2 – Four emergent properties of water contribute to Earth’s fitness for life
• Four properties: cohesive behavior, ability to moderate temperature, expansion upon freezing, versatility as a solvent
• Cohesion – the bonding of similar molecules through hydrogen bonds
• Adhesion – the clinging of one substance to another
• Surface tension – a measure of how difficult it is to stretch or break the surface of a liquid
• Kinetic energy – energy of motion