Water rockets

1. What is the best number of fins?   I think four fins would be better because my one's didn't go far 
2. What happens to the water rocket if you do not have fins?   it doesn't fly well . 
3. What is the best nose shape?     one like an ice cream cone.
4. What happens if you have a flat nose shape?   it doesn't fly well.
5. Does ballast at the nose make any difference?  no. 
6. What is the right amount of water?    A half of bottle of water .
7. Explain what happens if you have too much water?  it doesn't fly .
8. What is pushing the rocket to make it go faster? the air from the pump.
9. Name the 4 forces that effect the water rockets flight?    the fins  and the cone  and water.
10. What keeps the rocket moving once the water has all come out?   the  air .
11.  If you were to make a water rocket again what changes would you make? make it a bit better