1. Static Electricity (with a balloon) By: Andrea I. Garcia

2. Mv: Number of rubs against Scarf Rv: Time of balloon on wall Cv: Size of balloon Cv: Material of scarf Cv: Kind of wall

3. How does rubbing a balloon on a scarf for different amount of times (0,1,2,3) in the same direction affect how long the balloon will stick on the wall.?

4. Hypothesis: If we rub a balloon three times against the wool scarf then the balloon will stick longer on the wall than if we rub the balloon one time.

5. Materials Balloon Wooly scarf Stopwatch

6. Diagram: Rubbing Balloon Against scarf. Balloon on wall.

7. 1. Blow up the balloon and tie off the end. 2. Rub the balloon on the scarf once, in one direction. 3.Hold the balloon up on the wall, start the stop watch and release. Does it stay on the wall? If not, stop your stop watch and write "0 seconds" in your data table. 4. Repeat steps 3 and 4, increasing the number of rubs each time until the balloon sticks to the wall. When you increase the number of rubs do not rub the balloon back and forth, rub the balloon in the same direction each time. 5. When the balloon does stick to the wall, keep the stop watch going until the balloon falls off of the wall. When it does, stop the stop watch and write the time in the data table next to the matching number of rubs. 6. Repeat step 6, increasing the number of rubs each time and recording the amount of time the balloon sticks to the wall with the stop watch. Write the results in the data table each time.

8. TrialNumber of Rubs Stays on Wall? (Y/N) Time on Wall (seconds) 00 No 0 secs. 1 1 Yes4:23 secs 2 2 Yes 6:47 secs 3 3 Yes 8: 56 Secs Data Table:

9. Conclusion: My hypothesis was correct. I predicted that if we rub the balloon against the wool scarf three times then the balloon will stick onto the wall longer than if we rub it one time and that is exactly what happened. The highest data point is three rubs with an average of 8 minutes and 56 seconds. The low data point was zero rubs with an average of 0 seconds. In this investigation I learned that the more you rub a balloon against a wool scarf the more static electricity there is.