Title: Finding the amount of bubbles at different pressures.

Problem Statement: Which pressure will produce more bubbles? 60, 80, 100 or 110?

Method and Materials:

- four 2 Liter soda bottles (empty)
- four liters of distilled water
- four tire valve stems
- standard bike pump
- one funnel
- one metric measuring container
- one drill
- one soldering iron
- silicon sealant
- one permanent marker

1. Drill a hole in the middle of a soda bottle cap.
2. Use soldering iron and make the hole larger.
3. Put tire valve stems in the holes of the caps.
4. Seal the bottle cap to the tire valve stems with silicon sealant.
5. Make sure the valve is not leaking by pumping air into the bottle through the valve.
6. Wash out all four of the two liter soda bottles with distilled water.
7. Fill each two liter soda bottle with one liter of distilled water.
8. Using the tire pump, pump the first bottle to 60 psi, the second bottle to 80 psi, the third bottle to 100 psi and the fourth bottle to 110 psi.
9. Store bottles in a safe place.
10. Wait seven days.
11. Open all the bottles and watch for bubbles.
12. Let them sit for a few minutes with the caps off.
13. Check back every 20 minutes and see if there are more bubbles or less bubbles.

Hypothesis: The bottles with a higher psi should have more bubbles, 110, 100, 80 then 60 in order from highest to lowest in amount of bubbles.

Results: (Click Here)

Analytic Essay: (Click Here)

Conclusion: The pressure that produce the most bubbles was the bottle pumped to 100 psi.