2.Place a penny in front of you.

3.Squeeze the pipette and holding the bulb closed, insert the pipette into the beaker of water.

4.Release the bulb (water should draw up into the pipette).

5.Slowly release individual drops onto the penny.  

6.Count the number of  drops you can fit onto the penny.  Be sure to look at the penny at eye level after 20 drops.  It is amazing!

7.Record how many drops you were able to fit onto the penny.

8.Repeat the procedures, but this time, use alcohol instead of water.

9.Be sure to dry your pennies when you are finished. 

2.Place a penny in front of you.

3.Squeeze the pipette and holding the bulb closed, insert the pipette into the beaker of soapy water.

4.Release the bulb (water should draw up into the pipette).

5.Slowly release individual drops onto the penny.  

6.Does this differ from station 2?  Answer #3 and #4 on your worksheet!

7.Record how many drops you were able to fit onto the penny.

8. Be sure to dry your pennies when you are finished.

a)Obtain two (2) cotton swabs.

b)Squirt a little bit of water onto one cotton swab.

c)Squirt a little bit of alcohol onto the other cotton swab.

d)Have your partner take each swab and wipe the back of each hand at the same time. (Water swab on left, and alcohol swab on right).  

e)Which evaporates quickest? (This has a lower heat of vaporization.)

f)Clean up and throw away the used cotton swabs.

2. PART 2:

1.Think about the description and answer the questions on your worksheet. 

2.Put them together.

3.Pull them apart.

4.Now add a drop of water on one of the microscope slides.

5.Add the other microscope slide on top.

6.Try to pull it apart.

7.This is an example of cohesion (water sticking to water) and adhesion (water sticking to the glass).

8.Answer the corresponding questions on your worksheet.

2.Obtain 2 beakers.

3.Using a graduated cylinder, measure 25 ml of water and pour into each beaker.

4.Mass out 2 g of salt using a weighing boat and scale. (Zero out, or tare, the scale with the weighing boat before your start)

5.Place the salt into beaker 1 and stir using a stirring rod.

6.Mass out 2 g of cornstarch using a weighing boat and place it into beaker 2.  Stir using a stirring rod.

7.Record your results.  Answer question 2 - Which substance(s) did not completely dissolve in water? Why?

8.Rinse out your lab equipment and make sure your station is perfectly clean before moving onto the next.