Chapter 3 (p.46-56) Water & Life

Water is a polar compound because… Oxygen is more electronegative than hydrogen Creates an uneven distribution of electrons within the molecule

Water’s polarity leads to hydrogen bonding

Water’s Polarity Gives It Its Properties Adhesion & cohesion Ability to moderate temperature Expansion upon freezing Versatility as a solvent

Figure 3.3 Water transport in plants. 5

Figure 3.5 Effect of a large body of water on climate. 6

Hydrogen bond Liquid water: Hydrogen bonds break and re-form Ice: Figure 3.6 Hydrogen bond Liquid water: Hydrogen bonds break and re-form Figure 3.6 Ice: crystalline structure and floating barrier. Ice: Hydrogen bonds are stable 7

Figure 3.7 Table salt dissolving in water. 8