1. My science fair project By matt Thompson Biology per.3 12/14/09 By matt Thompson Biology per.3 12/14/09

2. My big question is  My big question is does a golf ball go further than a whiffle ball when launched off a catapult.

3. Hypothesis  My hypothesis is that the golf ball will go further than an whiffle ball when shot off a catapult.  I think that beacause a golf ball has more mass than an whiffle ball.  My hypothesis is that the golf ball will go further than an whiffle ball when shot off a catapult.  I think that beacause a golf ball has more mass than an whiffle ball.

4. Interesting facts  An interesting fact I found is that a whiffle ball is more aerodynamic than a golf ball so it would go further.  Also I found out heavier things go down faster than a lighter than heavy stuff  An interesting fact I found is that a whiffle ball is more aerodynamic than a golf ball so it would go further.  Also I found out heavier things go down faster than a lighter than heavy stuff

5. Materials  3 peices of wood 12 in. long  8 pieces of wood 6 in. long  Assorsment of screws and nails  Large rubber band  2 eye hooks  Glue  1 metal bar at least 6 in long  Piece of poster board or cardboard  3 peices of wood 12 in. long  8 pieces of wood 6 in. long  Assorsment of screws and nails  Large rubber band  2 eye hooks  Glue  1 metal bar at least 6 in long  Piece of poster board or cardboard

6. Assembly Cut two of the 6 in. to a 45 degree angle Take a 12in. And lay it down Take 2 6 in and nail or screw it to the 12in. Make mirrored piece Connect two sides together using remaining 6in. Pieces Drill hole in arm about 1\2in. From end Put hook in 3 in front of arm\fold cardboard into a holder for the ammo take metal bar and attach to each side in middle Put other hook on base Then decorate Cut two of the 6 in. to a 45 degree angle Take a 12in. And lay it down Take 2 6 in and nail or screw it to the 12in. Make mirrored piece Connect two sides together using remaining 6in. Pieces Drill hole in arm about 1\2in. From end Put hook in 3 in front of arm\fold cardboard into a holder for the ammo take metal bar and attach to each side in middle Put other hook on base Then decorate

7. Observations  I noticed that the whiffle ball made it 2 in further than the whiffle ball because it was more aerodynamic than a golf ball

8. conclusion  Was my hypothesis right or not?  My hypothesis wasn’t right because the whiffle ball went 41in. And the golf ball went 39in. So I was wrong.  I have one question and it is would a golf ball go further than an tennis ball.  Was my hypothesis right or not?  My hypothesis wasn’t right because the whiffle ball went 41in. And the golf ball went 39in. So I was wrong.  I have one question and it is would a golf ball go further than an tennis ball.