1. Water

2. Water  Chemical Formula H 2 O H 2 O 2 Hydrogen Atoms 2 Hydrogen Atoms 1 Oxygen Atom 1 Oxygen Atom

3. Ways water is unique  Polar Molecule  Surface Tension  Capillary Action

4. Ways water is unique  Change in State  Universal Solvent

5. Polar Molecule  A molecule that has electrically charged areas

6. Polar Molecule  Oxygen= negative  Hydrogen= positive

7. Polar Molecule Many billions of water molecules Arrangement of water molecules A water molecule

8. Polar Molecule  Positive Hydrogen ends of 1 water molecule attract the negative oxygen ends of another water molecule  Water Molecules stick together (COHESION)

9. Surface Tension  Tightness across the surface of water  Caused by the polar molecules pulling on one another

10. Surface Tension  Causes the surface of water to be curved shape

11. Capillary Action  Demonstration

12. Capillary Action  The combined force of attraction between water molecules with the molecules of surrounding materials

13. Capillary Action  Causes the water inside a straw to rise higher than the water outside the straw  Causes water to move up a string or paper

14. Change in State  Water is the only substance on Earth that commonly exists in all of its different states!!!!

15. Universal Solvent  Water is able to dissolve many substances because it is polar  The charged ends of the water molecule attract the molecules of other polar substances (ADHESION)