1. Essential Question Why is water called the universal solvent if it does not dissolve everything?

2. Water The Universal Solvent

3. Demo Compare the dry ice and ice Into a large flask add: 750 ml of water 10 drops universal indicator 75 ml of.1M NaOH observe Add several pieces of dry ice observe

4. In your composition book… On the next clean page, Title: Water Date: Oct 31, 2013 Explain what you just saw in the Demo. Include vocabulary words: Solvent, solute, aqueous, solution, sublimation, dissolved gas

5. Lesson Frame I will discover the unique (unusual) properties of water. by observing water’s interaction with itself and other objects mastered when I can describe water’s behavior in terms of adhesion, cohesion, capillary action, and surface tension.

6. Activity 1 Materials : video clip 1. Observe the video. 2. Write 2 - 3 sentences talking about how water is unique based on the video. http://www.flixxy.com/water-drop.htm http://www.flixxy.com/water-drop.htm

7. For all of the following activities… Make a prediction of what you think will happen before you start procedure and record in composition book

8. Activity 2 Materials: pipette tip, colored water, small medicine cup fill cup a quarter full of colored water place pipette tip perpendicular in the water make and record observations on what you see

9. Activity 3 Materials: small plastic cup, water and card fill plastic cup half way with water place playing card over cup While holding the card on top of cup, turn cup upside down Carefully (don’t squeeze) hold just the cup (the card is now under the cup) make observations

10. Activity 4 Materials: 2 microscope slides, water, dropper place a drop of water onto one microscope slide place second slide on top of the other slide try to separate by pulling them apart

11. Activity 5 Materials: pre-soaked cotton string, water, 2 beakers pull string out of water beaker pull string taut (tight) from one beaker to empty beaker raise the water beaker slightly above empty beaker try to pour the water along the string to collect in opposite beaker make observations

12. Activity 6 Materials: 1 plastic cup, water, small cork Fill plastic cup half way with water. Place the cork in the water Make observations Pull the cork out Completely fill cup with water until it overflows Place cork on water dome Make observations

13. Activity 7 Materials: plastic cup, water, needle Fill a cup (almost to top) with water Carefully set the needle on the top of the water. Will it float?

14. Exit ticket Use the words/phrases on each slide to form a definition for each of the properties of water. Along with your definition, list an activity where you observed this property.

15. Adhesion allows water molecules to stick to or spread out on other surfaces instead of sticking together in a ball

16. Cohesion Intermolecular attraction which holds molecules in a drop of water together

17. Surface Tension is a result of water molecules strong cohesion to each other

18. Capillary Action is a result of water sticking to the inside of a tube