PROBLEM: Why can a pin float in water and how can water rise up a thin tube by itself?

PREDICTION:

EXPERIMENT I
MATERIALS: pin, glass of water, paper tissue

PROCEDURE: Try to get the pin to float. Remember the principles of surface tension that your instructor reviewed.

Describe the set-up that allowed the pin to float.

How did surface tension help the pin float? 

EXPERIMENT II
MATERIALS: clear straw, plexiglass tube, glass capillarity tube, small closed tube, glass of water.

PROCEDURE: Place the plexiglass tube and the glass capillary tube in a glass of water.

1. Predict in which tube the water level will rise highest. Draw the results.
     
     
     
     
     
     
2. Now put in the plastic straw; observe its water level. Explain the differences in the water levels. Draw the results.
     
     
     
     
     
     
3. Now put the closed tube, open end down in the water. Draw the results. What happens here? Does the reason why this happen have anything to do with the results of #1 and #2?
     
     
     
     
   

CONCLUSION: