1. Water Properties

2. Water Molecules Water is a __________________________________ That means even though the electrons are shared, the oxygen molecule holds onto them and only shares a little with the hydrogen molecules The _______________________________________

3. Water Molecules The bond angle between the hydrogen molecules is ______________

4. Hydrogen Bonding Forces of attraction between water molecules Reason water has it’s unique properties

5. Liquid Water Water is a liquid over a large range of temperatures Has a high boiling point _________________________________ If water had a lower boiling point, what would have happened to the lakes and oceans?

6. Liquid Water It takes a lot of energy to raise the temperature of water Stores a lot of energy in the bonds without raising the temperature much This helps moderate Earth’s climate

7. Evaporating Water Water absorbs a large amount of heat as it changes into water vapor Evaporation is a _______________ process Heat is released when vapor condenses This helps distribute heat around the world

8. Water as a _______________ Water is able to dissolve many compounds Carries nutrients through organisms Great as a cleaner Removes and dissolves wastes Makes water easily pollutable

9. Water as a _______________ Water filters UV light Why there is no light at depth Filters out harmful UV rays

10. pH of Water Water is usually neutral with a pH of _________ Dissolved substances change the pH of water Bottled waters tend to be more acidic

11. Surface Tension Allows the surface of water to resist an outside force Allows bugs and some smaller reptiles to walk/ run on the surface of the water

12. Cohesion and Adhesion Cohesion: attractive forces between water molecules, __________________________________ Adhesion: attractive forces between water molecules and other molecules, ________________ ___________________

13. Capillary Action Water rises in a narrow tube against the force of gravity Collective action of cohesion, adhesion, and surface tension Allows water move up xylem in plants

14. Water as a Solid Water _______________ as it ________________ Allows ice to float on water because it has a lower density What would happen to fish if lakes froze solid in the winter?