1. February 7 Water Lab Make-Up

2. Instructions Follow the PowerPoint Click on the links to see the video demo for each topic Answer the questions Try some of these at home, if you can.

3. Properties of Water Important Terms: Capillary Action Heat Capacity Polarity Adhesion Cohesion

4. Adhesion Sticks to something else

5. Cohesion Sticks to itself

6. Capillary Action Capillary Action is the ability of a liquid to flow against gravity. Make a hypothesis about what you think will happen. Video: The Tissue Bridge Where is each occurring in the demo? Adhesion? Cohesion?

7. How Water Works Answer the viewing questions on the Properties of Water worksheet as you watch Video: How Stuff Works – Water ~35 min long More difficult alternate: Look up the answers online

8. Heat Capacity Heat capacity is how much heat is needed to raise the temperature of a substance by 1˚ C For example:

9. Heat Capacity Honolulu, Hawaii – High (Feb 5, 2014): 78 F (12:53 PM) – Low (Feb 5, 2014): 68 F (12:53 AM) – Past 10 days: ~10 degree difference Yuma, AZ – High (Feb 5, 2014): 70 F (1:57 PM) – Low (Feb 5, 2014): 53 F (11:57 PM) – Past 10 days: ~20-30 degree difference

10. Heat Capacity Video: Balloons on Fire Which has a greater heat capacity: – Air or water? Why? What evidence is there to back up your conclusion?

11. Surface Tension How many drops can you fit on a penny? Video: Penny What shape does the water make? Try a penny smeared with dish soap Video: Penny with Soap

12. Surface Tension Water Strider (Yes, it’s that guy from Top Gear.) In Spaaaaaaace – Where do you see adhesion? – Where do you see cohesion?

13. Polarity Water Bending Rub a balloon on the cloth. Hold the balloon to a trickle of water. What happens? Why does the water move towards the balloon (or PCV pipe)?